28990280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1607}}^1$

素因数の和:1670

約数の個数: 64

約数和(自身を含む): 72938880

約数和(自身を除く): 43948600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1607, 1640, 1804, 2255, 3214, 3608, 4510, 6428, 8035, 9020, 12856, 16070, 17677, 18040, 32140, 35354, 64280, 65887, 70708, 88385, 131774, 141416, 176770, 263548, 329435, 353540, 527096, 658870, 707080, 724757, 1317740, 1449514, 2635480, 2899028, 3623785, 5798056, 7247570, 14495140, 28990280]

約数ペア:

[(1, 28990280), (2, 14495140), (4, 7247570), (5, 5798056), (8, 3623785), (10, 2899028), (11, 2635480), (20, 1449514), (22, 1317740), (40, 724757), (41, 707080), (44, 658870), (55, 527096), (82, 353540), (88, 329435), (110, 263548), (164, 176770), (205, 141416), (220, 131774), (328, 88385), (410, 70708), (440, 65887), (451, 64280), (820, 35354), (902, 32140), (1607, 18040), (1640, 17677), (1804, 16070), (2255, 12856), (3214, 9020), (3608, 8035), (4510, 6428)]