1280240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1231}}^1$

素因数の和:1257

約数の個数: 40

約数和(自身を含む): 3208128

約数和(自身を除く): 1927888

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 1231, 2462, 4924, 6155, 9848, 12310, 16003, 19696, 24620, 32006, 49240, 64012, 80015, 98480, 128024, 160030, 256048, 320060, 640120, 1280240]

約数ペア:

[(1, 1280240), (2, 640120), (4, 320060), (5, 256048), (8, 160030), (10, 128024), (13, 98480), (16, 80015), (20, 64012), (26, 49240), (40, 32006), (52, 24620), (65, 19696), (80, 16003), (104, 12310), (130, 9848), (208, 6155), (260, 4924), (520, 2462), (1040, 1231)]