649480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1249}}^1$

素因数の和:1273

約数の個数: 32

約数和(自身を含む): 1575000

約数和(自身を除く): 925520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1249, 2498, 4996, 6245, 9992, 12490, 16237, 24980, 32474, 49960, 64948, 81185, 129896, 162370, 324740, 649480]

約数ペア:

[(1, 649480), (2, 324740), (4, 162370), (5, 129896), (8, 81185), (10, 64948), (13, 49960), (20, 32474), (26, 24980), (40, 16237), (52, 12490), (65, 9992), (104, 6245), (130, 4996), (260, 2498), (520, 1249)]