256880260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:246

約数の個数: 192

約数和(自身を含む): 713502720

約数和(自身を除く): 456622460

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 29, 31, 35, 52, 58, 62, 65, 70, 91, 116, 124, 130, 140, 145, 155, 157, 182, 203, 217, 260, 290, 310, 314, 364, 377, 403, 406, 434, 455, 580, 620, 628, 754, 785, 806, 812, 868, 899, 910, 1015, 1085, 1099, 1508, 1570, 1612, 1798, 1820, 1885, 2015, 2030, 2041, 2170, 2198, 2639, 2821, 3140, 3596, 3770, 4030, 4060, 4082, 4340, 4396, 4495, 4553, 4867, 5278, 5495, 5642, 6293, 7540, 8060, 8164, 8990, 9106, 9734, 10205, 10556, 10990, 11284, 11687, 12586, 13195, 14105, 14287, 17980, 18212, 19468, 20410, 21980, 22765, 23374, 24335, 25172, 26390, 28210, 28574, 31465, 31871, 34069, 40820, 45530, 46748, 48670, 52780, 56420, 57148, 58435, 59189, 62930, 63271, 63742, 68138, 71435, 81809, 91060, 97340, 116870, 118378, 125860, 126542, 127484, 136276, 141143, 142870, 159355, 163618, 170345, 233740, 236756, 253084, 282286, 285740, 295945, 316355, 318710, 327236, 340690, 409045, 414323, 442897, 564572, 591890, 632710, 637420, 681380, 705715, 818090, 828646, 885794, 988001, 1183780, 1265420, 1411430, 1636180, 1657292, 1771588, 1834859, 1976002, 2071615, 2214485, 2822860, 3669718, 3952004, 4143230, 4428970, 4940005, 7339436, 8286460, 8857940, 9174295, 9880010, 12844013, 18348590, 19760020, 25688026, 36697180, 51376052, 64220065, 128440130, 256880260]

約数ペア:

[(1, 256880260), (2, 128440130), (4, 64220065), (5, 51376052), (7, 36697180), (10, 25688026), (13, 19760020), (14, 18348590), (20, 12844013), (26, 9880010), (28, 9174295), (29, 8857940), (31, 8286460), (35, 7339436), (52, 4940005), (58, 4428970), (62, 4143230), (65, 3952004), (70, 3669718), (91, 2822860), (116, 2214485), (124, 2071615), (130, 1976002), (140, 1834859), (145, 1771588), (155, 1657292), (157, 1636180), (182, 1411430), (203, 1265420), (217, 1183780), (260, 988001), (290, 885794), (310, 828646), (314, 818090), (364, 705715), (377, 681380), (403, 637420), (406, 632710), (434, 591890), (455, 564572), (580, 442897), (620, 414323), (628, 409045), (754, 340690), (785, 327236), (806, 318710), (812, 316355), (868, 295945), (899, 285740), (910, 282286), (1015, 253084), (1085, 236756), (1099, 233740), (1508, 170345), (1570, 163618), (1612, 159355), (1798, 142870), (1820, 141143), (1885, 136276), (2015, 127484), (2030, 126542), (2041, 125860), (2170, 118378), (2198, 116870), (2639, 97340), (2821, 91060), (3140, 81809), (3596, 71435), (3770, 68138), (4030, 63742), (4060, 63271), (4082, 62930), (4340, 59189), (4396, 58435), (4495, 57148), (4553, 56420), (4867, 52780), (5278, 48670), (5495, 46748), (5642, 45530), (6293, 40820), (7540, 34069), (8060, 31871), (8164, 31465), (8990, 28574), (9106, 28210), (9734, 26390), (10205, 25172), (10556, 24335), (10990, 23374), (11284, 22765), (11687, 21980), (12586, 20410), (13195, 19468), (14105, 18212), (14287, 17980)]