678889240

素因数分解:

$2^3\times 5^1\times {\mathrm{2179}}^1\times {\mathrm{7789}}^1$

素因数の和:9979

約数の個数: 32

約数和(自身を含む): 1528398000

約数和(自身を除く): 849508760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2179, 4358, 7789, 8716, 10895, 15578, 17432, 21790, 31156, 38945, 43580, 62312, 77890, 87160, 155780, 311560, 16972231, 33944462, 67888924, 84861155, 135777848, 169722310, 339444620, 678889240]

約数ペア:

[(1, 678889240), (2, 339444620), (4, 169722310), (5, 135777848), (8, 84861155), (10, 67888924), (20, 33944462), (40, 16972231), (2179, 311560), (4358, 155780), (7789, 87160), (8716, 77890), (10895, 62312), (15578, 43580), (17432, 38945), (21790, 31156)]