28704520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55201}}^1$

素因数の和:55225

約数の個数: 32

約数和(自身を含む): 69554520

約数和(自身を除く): 40850000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 55201, 110402, 220804, 276005, 441608, 552010, 717613, 1104020, 1435226, 2208040, 2870452, 3588065, 5740904, 7176130, 14352260, 28704520]

約数ペア:

[(1, 28704520), (2, 14352260), (4, 7176130), (5, 5740904), (8, 3588065), (10, 2870452), (13, 2208040), (20, 1435226), (26, 1104020), (40, 717613), (52, 552010), (65, 441608), (104, 276005), (130, 220804), (260, 110402), (520, 55201)]