2640560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2539}}^1$

素因数の和:2565

約数の個数: 40

約数和(自身を含む): 6614160

約数和(自身を除く): 3973600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 2539, 5078, 10156, 12695, 20312, 25390, 33007, 40624, 50780, 66014, 101560, 132028, 165035, 203120, 264056, 330070, 528112, 660140, 1320280, 2640560]

約数ペア:

[(1, 2640560), (2, 1320280), (4, 660140), (5, 528112), (8, 330070), (10, 264056), (13, 203120), (16, 165035), (20, 132028), (26, 101560), (40, 66014), (52, 50780), (65, 40624), (80, 33007), (104, 25390), (130, 20312), (208, 12695), (260, 10156), (520, 5078), (1040, 2539)]