21132700

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:463

約数の個数: 72

約数和(自身を含む): 50246784

約数和(自身を除く): 29114084

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 31, 34, 50, 62, 68, 85, 100, 124, 155, 170, 310, 340, 401, 425, 527, 620, 775, 802, 850, 1054, 1550, 1604, 1700, 2005, 2108, 2635, 3100, 4010, 5270, 6817, 8020, 10025, 10540, 12431, 13175, 13634, 20050, 24862, 26350, 27268, 34085, 40100, 49724, 52700, 62155, 68170, 124310, 136340, 170425, 211327, 248620, 310775, 340850, 422654, 621550, 681700, 845308, 1056635, 1243100, 2113270, 4226540, 5283175, 10566350, 21132700]

約数ペア:

[(1, 21132700), (2, 10566350), (4, 5283175), (5, 4226540), (10, 2113270), (17, 1243100), (20, 1056635), (25, 845308), (31, 681700), (34, 621550), (50, 422654), (62, 340850), (68, 310775), (85, 248620), (100, 211327), (124, 170425), (155, 136340), (170, 124310), (310, 68170), (340, 62155), (401, 52700), (425, 49724), (527, 40100), (620, 34085), (775, 27268), (802, 26350), (850, 24862), (1054, 20050), (1550, 13634), (1604, 13175), (1700, 12431), (2005, 10540), (2108, 10025), (2635, 8020), (3100, 6817), (4010, 5270)]