389640245

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 489016320

約数和(自身を除く): 99376075

約数列:

[1, 5, 61, 79, 103, 157, 305, 395, 515, 785, 4819, 6283, 8137, 9577, 12403, 16171, 24095, 31415, 40685, 47885, 62015, 80855, 496357, 756583, 986431, 1277509, 2481785, 3782915, 4932155, 6387545, 77928049, 389640245]

約数ペア:

[(1, 389640245), (5, 77928049), (61, 6387545), (79, 4932155), (103, 3782915), (157, 2481785), (305, 1277509), (395, 986431), (515, 756583), (785, 496357), (4819, 80855), (6283, 62015), (8137, 47885), (9577, 40685), (12403, 31415), (16171, 24095)]