20880940

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{19699}}^1$

素因数の和:19761

約数の個数: 24

約数和(自身を含む): 44679600

約数和(自身を除く): 23798660

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 19699, 39398, 78796, 98495, 196990, 393980, 1044047, 2088094, 4176188, 5220235, 10440470, 20880940]

約数ペア:

[(1, 20880940), (2, 10440470), (4, 5220235), (5, 4176188), (10, 2088094), (20, 1044047), (53, 393980), (106, 196990), (212, 98495), (265, 78796), (530, 39398), (1060, 19699)]