21234680

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7477}}^1$

素因数の和:7559

約数の個数: 32

約数和(自身を含む): 48457440

約数和(自身を除く): 27222760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7477, 14954, 29908, 37385, 59816, 74770, 149540, 299080, 530867, 1061734, 2123468, 2654335, 4246936, 5308670, 10617340, 21234680]

約数ペア:

[(1, 21234680), (2, 10617340), (4, 5308670), (5, 4246936), (8, 2654335), (10, 2123468), (20, 1061734), (40, 530867), (71, 299080), (142, 149540), (284, 74770), (355, 59816), (568, 37385), (710, 29908), (1420, 14954), (2840, 7477)]