81357640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1$

素因数の和:172

約数の個数: 192

約数和(自身を含む): 239016960

約数和(自身を除く): 157659320

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 31, 35, 40, 49, 52, 56, 62, 65, 70, 91, 98, 103, 104, 124, 130, 140, 155, 182, 196, 206, 217, 245, 248, 260, 280, 310, 364, 392, 403, 412, 434, 455, 490, 515, 520, 620, 637, 721, 728, 806, 824, 868, 910, 980, 1030, 1085, 1240, 1274, 1339, 1442, 1519, 1612, 1736, 1820, 1960, 2015, 2060, 2170, 2548, 2678, 2821, 2884, 3038, 3185, 3193, 3224, 3605, 3640, 4030, 4120, 4340, 5047, 5096, 5356, 5642, 5768, 6076, 6370, 6386, 6695, 7210, 7595, 8060, 8680, 9373, 10094, 10712, 11284, 12152, 12740, 12772, 13390, 14105, 14420, 15190, 15965, 16120, 18746, 19747, 20188, 22351, 22568, 25235, 25480, 25544, 26780, 28210, 28840, 30380, 31930, 37492, 39494, 40376, 41509, 44702, 46865, 50470, 53560, 56420, 60760, 63860, 65611, 74984, 78988, 83018, 89404, 93730, 98735, 100940, 111755, 112840, 127720, 131222, 156457, 157976, 166036, 178808, 187460, 197470, 201880, 207545, 223510, 262444, 290563, 312914, 328055, 332072, 374920, 394940, 415090, 447020, 524888, 581126, 625828, 656110, 782285, 789880, 830180, 894040, 1162252, 1251656, 1312220, 1452815, 1564570, 1660360, 2033941, 2324504, 2624440, 2905630, 3129140, 4067882, 5811260, 6258280, 8135764, 10169705, 11622520, 16271528, 20339410, 40678820, 81357640]

約数ペア:

[(1, 81357640), (2, 40678820), (4, 20339410), (5, 16271528), (7, 11622520), (8, 10169705), (10, 8135764), (13, 6258280), (14, 5811260), (20, 4067882), (26, 3129140), (28, 2905630), (31, 2624440), (35, 2324504), (40, 2033941), (49, 1660360), (52, 1564570), (56, 1452815), (62, 1312220), (65, 1251656), (70, 1162252), (91, 894040), (98, 830180), (103, 789880), (104, 782285), (124, 656110), (130, 625828), (140, 581126), (155, 524888), (182, 447020), (196, 415090), (206, 394940), (217, 374920), (245, 332072), (248, 328055), (260, 312914), (280, 290563), (310, 262444), (364, 223510), (392, 207545), (403, 201880), (412, 197470), (434, 187460), (455, 178808), (490, 166036), (515, 157976), (520, 156457), (620, 131222), (637, 127720), (721, 112840), (728, 111755), (806, 100940), (824, 98735), (868, 93730), (910, 89404), (980, 83018), (1030, 78988), (1085, 74984), (1240, 65611), (1274, 63860), (1339, 60760), (1442, 56420), (1519, 53560), (1612, 50470), (1736, 46865), (1820, 44702), (1960, 41509), (2015, 40376), (2060, 39494), (2170, 37492), (2548, 31930), (2678, 30380), (2821, 28840), (2884, 28210), (3038, 26780), (3185, 25544), (3193, 25480), (3224, 25235), (3605, 22568), (3640, 22351), (4030, 20188), (4120, 19747), (4340, 18746), (5047, 16120), (5096, 15965), (5356, 15190), (5642, 14420), (5768, 14105), (6076, 13390), (6370, 12772), (6386, 12740), (6695, 12152), (7210, 11284), (7595, 10712), (8060, 10094), (8680, 9373)]