21453640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41257}}^1$

素因数の和:41281

約数の個数: 32

約数和(自身を含む): 51985080

約数和(自身を除く): 30531440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41257, 82514, 165028, 206285, 330056, 412570, 536341, 825140, 1072682, 1650280, 2145364, 2681705, 4290728, 5363410, 10726820, 21453640]

約数ペア:

[(1, 21453640), (2, 10726820), (4, 5363410), (5, 4290728), (8, 2681705), (10, 2145364), (13, 1650280), (20, 1072682), (26, 825140), (40, 536341), (52, 412570), (65, 330056), (104, 206285), (130, 165028), (260, 82514), (520, 41257)]