402168280

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{20477}}^1$

素因数の和:20979

約数の個数: 32

約数和(自身を含む): 906765840

約数和(自身を除く): 504597560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3928, 4910, 9820, 19640, 20477, 40954, 81908, 102385, 163816, 204770, 409540, 819080, 10054207, 20108414, 40216828, 50271035, 80433656, 100542070, 201084140, 402168280]

約数ペア:

[(1, 402168280), (2, 201084140), (4, 100542070), (5, 80433656), (8, 50271035), (10, 40216828), (20, 20108414), (40, 10054207), (491, 819080), (982, 409540), (1964, 204770), (2455, 163816), (3928, 102385), (4910, 81908), (9820, 40954), (19640, 20477)]