129916400

素因数分解:

$2^4\times 5^2\times {\mathrm{324791}}^1$

素因数の和:324809

約数の個数: 30

約数和(自身を含む): 312125112

約数和(自身を除く): 182208712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 324791, 649582, 1299164, 1623955, 2598328, 3247910, 5196656, 6495820, 8119775, 12991640, 16239550, 25983280, 32479100, 64958200, 129916400]

約数ペア:

[(1, 129916400), (2, 64958200), (4, 32479100), (5, 25983280), (8, 16239550), (10, 12991640), (16, 8119775), (20, 6495820), (25, 5196656), (40, 3247910), (50, 2598328), (80, 1623955), (100, 1299164), (200, 649582), (400, 324791)]