20394740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{229}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 44320080

約数和(自身を除く): 23925340

約数列:

[1, 2, 4, 5, 10, 20, 61, 73, 122, 146, 229, 244, 292, 305, 365, 458, 610, 730, 916, 1145, 1220, 1460, 2290, 4453, 4580, 8906, 13969, 16717, 17812, 22265, 27938, 33434, 44530, 55876, 66868, 69845, 83585, 89060, 139690, 167170, 279380, 334340, 1019737, 2039474, 4078948, 5098685, 10197370, 20394740]

約数ペア:

[(1, 20394740), (2, 10197370), (4, 5098685), (5, 4078948), (10, 2039474), (20, 1019737), (61, 334340), (73, 279380), (122, 167170), (146, 139690), (229, 89060), (244, 83585), (292, 69845), (305, 66868), (365, 55876), (458, 44530), (610, 33434), (730, 27938), (916, 22265), (1145, 17812), (1220, 16717), (1460, 13969), (2290, 8906), (4453, 4580)]