21097980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:264

約数の個数: 144

約数和(自身を含む): 69888000

約数和(自身を除く): 48790020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 31, 36, 38, 45, 57, 60, 62, 76, 90, 93, 95, 114, 124, 155, 171, 180, 186, 190, 199, 228, 279, 285, 310, 342, 372, 380, 398, 465, 558, 570, 589, 597, 620, 684, 796, 855, 930, 995, 1116, 1140, 1178, 1194, 1395, 1710, 1767, 1791, 1860, 1990, 2356, 2388, 2790, 2945, 2985, 3420, 3534, 3582, 3781, 3980, 5301, 5580, 5890, 5970, 6169, 7068, 7164, 7562, 8835, 8955, 10602, 11343, 11780, 11940, 12338, 15124, 17670, 17910, 18507, 18905, 21204, 22686, 24676, 26505, 30845, 34029, 35340, 35820, 37014, 37810, 45372, 53010, 55521, 56715, 61690, 68058, 74028, 75620, 92535, 106020, 111042, 113430, 117211, 123380, 136116, 170145, 185070, 222084, 226860, 234422, 277605, 340290, 351633, 370140, 468844, 555210, 586055, 680580, 703266, 1054899, 1110420, 1172110, 1406532, 1758165, 2109798, 2344220, 3516330, 4219596, 5274495, 7032660, 10548990, 21097980]

約数ペア:

[(1, 21097980), (2, 10548990), (3, 7032660), (4, 5274495), (5, 4219596), (6, 3516330), (9, 2344220), (10, 2109798), (12, 1758165), (15, 1406532), (18, 1172110), (19, 1110420), (20, 1054899), (30, 703266), (31, 680580), (36, 586055), (38, 555210), (45, 468844), (57, 370140), (60, 351633), (62, 340290), (76, 277605), (90, 234422), (93, 226860), (95, 222084), (114, 185070), (124, 170145), (155, 136116), (171, 123380), (180, 117211), (186, 113430), (190, 111042), (199, 106020), (228, 92535), (279, 75620), (285, 74028), (310, 68058), (342, 61690), (372, 56715), (380, 55521), (398, 53010), (465, 45372), (558, 37810), (570, 37014), (589, 35820), (597, 35340), (620, 34029), (684, 30845), (796, 26505), (855, 24676), (930, 22686), (995, 21204), (1116, 18905), (1140, 18507), (1178, 17910), (1194, 17670), (1395, 15124), (1710, 12338), (1767, 11940), (1791, 11780), (1860, 11343), (1990, 10602), (2356, 8955), (2388, 8835), (2790, 7562), (2945, 7164), (2985, 7068), (3420, 6169), (3534, 5970), (3582, 5890), (3781, 5580), (3980, 5301)]