389464840

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{40739}}^1$

素因数の和:40989

約数の個数: 32

約数和(自身を含む): 879984000

約数和(自身を除く): 490519160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2390, 4780, 9560, 40739, 81478, 162956, 203695, 325912, 407390, 814780, 1629560, 9736621, 19473242, 38946484, 48683105, 77892968, 97366210, 194732420, 389464840]

約数ペア:

[(1, 389464840), (2, 194732420), (4, 97366210), (5, 77892968), (8, 48683105), (10, 38946484), (20, 19473242), (40, 9736621), (239, 1629560), (478, 814780), (956, 407390), (1195, 325912), (1912, 203695), (2390, 162956), (4780, 81478), (9560, 40739)]