21369580

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{149}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 46267200

約数和(自身を除く): 24897620

約数列:

[1, 2, 4, 5, 10, 20, 71, 101, 142, 149, 202, 284, 298, 355, 404, 505, 596, 710, 745, 1010, 1420, 1490, 2020, 2980, 7171, 10579, 14342, 15049, 21158, 28684, 30098, 35855, 42316, 52895, 60196, 71710, 75245, 105790, 143420, 150490, 211580, 300980, 1068479, 2136958, 4273916, 5342395, 10684790, 21369580]

約数ペア:

[(1, 21369580), (2, 10684790), (4, 5342395), (5, 4273916), (10, 2136958), (20, 1068479), (71, 300980), (101, 211580), (142, 150490), (149, 143420), (202, 105790), (284, 75245), (298, 71710), (355, 60196), (404, 52895), (505, 42316), (596, 35855), (710, 30098), (745, 28684), (1010, 21158), (1420, 15049), (1490, 14342), (2020, 10579), (2980, 7171)]