31781000

素因数分解:

$2^3\times 5^3\times {\mathrm{61}}^1\times {\mathrm{521}}^1$

素因数の和:603

約数の個数: 64

約数和(自身を含む): 75731760

約数和(自身を除く): 43950760

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 125, 200, 244, 250, 305, 488, 500, 521, 610, 1000, 1042, 1220, 1525, 2084, 2440, 2605, 3050, 4168, 5210, 6100, 7625, 10420, 12200, 13025, 15250, 20840, 26050, 30500, 31781, 52100, 61000, 63562, 65125, 104200, 127124, 130250, 158905, 254248, 260500, 317810, 521000, 635620, 794525, 1271240, 1589050, 3178100, 3972625, 6356200, 7945250, 15890500, 31781000]

約数ペア:

[(1, 31781000), (2, 15890500), (4, 7945250), (5, 6356200), (8, 3972625), (10, 3178100), (20, 1589050), (25, 1271240), (40, 794525), (50, 635620), (61, 521000), (100, 317810), (122, 260500), (125, 254248), (200, 158905), (244, 130250), (250, 127124), (305, 104200), (488, 65125), (500, 63562), (521, 61000), (610, 52100), (1000, 31781), (1042, 30500), (1220, 26050), (1525, 20840), (2084, 15250), (2440, 13025), (2605, 12200), (3050, 10420), (4168, 7625), (5210, 6100)]