15721940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3557}}^1$

素因数の和:3596

約数の個数: 48

約数和(自身を含む): 37657872

約数和(自身を除く): 21935932

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 3557, 4420, 7114, 14228, 17785, 35570, 46241, 60469, 71140, 92482, 120938, 184964, 231205, 241876, 302345, 462410, 604690, 786097, 924820, 1209380, 1572194, 3144388, 3930485, 7860970, 15721940]

約数ペア:

[(1, 15721940), (2, 7860970), (4, 3930485), (5, 3144388), (10, 1572194), (13, 1209380), (17, 924820), (20, 786097), (26, 604690), (34, 462410), (52, 302345), (65, 241876), (68, 231205), (85, 184964), (130, 120938), (170, 92482), (221, 71140), (260, 60469), (340, 46241), (442, 35570), (884, 17785), (1105, 14228), (2210, 7114), (3557, 4420)]