21591700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{977}}^1$

素因数の和:1021

約数の個数: 72

約数和(自身を含む): 53480952

約数和(自身を除く): 31889252

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 25, 26, 34, 50, 52, 65, 68, 85, 100, 130, 170, 221, 260, 325, 340, 425, 442, 650, 850, 884, 977, 1105, 1300, 1700, 1954, 2210, 3908, 4420, 4885, 5525, 9770, 11050, 12701, 16609, 19540, 22100, 24425, 25402, 33218, 48850, 50804, 63505, 66436, 83045, 97700, 127010, 166090, 215917, 254020, 317525, 332180, 415225, 431834, 635050, 830450, 863668, 1079585, 1270100, 1660900, 2159170, 4318340, 5397925, 10795850, 21591700]

約数ペア:

[(1, 21591700), (2, 10795850), (4, 5397925), (5, 4318340), (10, 2159170), (13, 1660900), (17, 1270100), (20, 1079585), (25, 863668), (26, 830450), (34, 635050), (50, 431834), (52, 415225), (65, 332180), (68, 317525), (85, 254020), (100, 215917), (130, 166090), (170, 127010), (221, 97700), (260, 83045), (325, 66436), (340, 63505), (425, 50804), (442, 48850), (650, 33218), (850, 25402), (884, 24425), (977, 22100), (1105, 19540), (1300, 16609), (1700, 12701), (1954, 11050), (2210, 9770), (3908, 5525), (4420, 4885)]