20878680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{677}}^1$

素因数の和:948

約数の個数: 64

約数和(自身を含む): 62972640

約数和(自身を除く): 42093960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 257, 514, 677, 771, 1028, 1285, 1354, 1542, 2031, 2056, 2570, 2708, 3084, 3385, 3855, 4062, 5140, 5416, 6168, 6770, 7710, 8124, 10155, 10280, 13540, 15420, 16248, 20310, 27080, 30840, 40620, 81240, 173989, 347978, 521967, 695956, 869945, 1043934, 1391912, 1739890, 2087868, 2609835, 3479780, 4175736, 5219670, 6959560, 10439340, 20878680]

約数ペア:

[(1, 20878680), (2, 10439340), (3, 6959560), (4, 5219670), (5, 4175736), (6, 3479780), (8, 2609835), (10, 2087868), (12, 1739890), (15, 1391912), (20, 1043934), (24, 869945), (30, 695956), (40, 521967), (60, 347978), (120, 173989), (257, 81240), (514, 40620), (677, 30840), (771, 27080), (1028, 20310), (1285, 16248), (1354, 15420), (1542, 13540), (2031, 10280), (2056, 10155), (2570, 8124), (2708, 7710), (3084, 6770), (3385, 6168), (3855, 5416), (4062, 5140)]