28740560

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{3557}}^1$

素因数の和:3671

約数の個数: 40

約数和(自身を含む): 67502376

約数和(自身を除く): 38761816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 3557, 4040, 7114, 8080, 14228, 17785, 28456, 35570, 56912, 71140, 142280, 284560, 359257, 718514, 1437028, 1796285, 2874056, 3592570, 5748112, 7185140, 14370280, 28740560]

約数ペア:

[(1, 28740560), (2, 14370280), (4, 7185140), (5, 5748112), (8, 3592570), (10, 2874056), (16, 1796285), (20, 1437028), (40, 718514), (80, 359257), (101, 284560), (202, 142280), (404, 71140), (505, 56912), (808, 35570), (1010, 28456), (1616, 17785), (2020, 14228), (3557, 8080), (4040, 7114)]