640120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1231}}^1$

素因数の和:1255

約数の個数: 32

約数和(自身を含む): 1552320

約数和(自身を除く): 912200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1231, 2462, 4924, 6155, 9848, 12310, 16003, 24620, 32006, 49240, 64012, 80015, 128024, 160030, 320060, 640120]

約数ペア:

[(1, 640120), (2, 320060), (4, 160030), (5, 128024), (8, 80015), (10, 64012), (13, 49240), (20, 32006), (26, 24620), (40, 16003), (52, 12310), (65, 9848), (104, 6155), (130, 4924), (260, 2462), (520, 1231)]