18820940

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{15427}}^1$

素因数の和:15497

約数の個数: 24

約数和(自身を含む): 40174512

約数和(自身を除く): 21353572

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 15427, 30854, 61708, 77135, 154270, 308540, 941047, 1882094, 3764188, 4705235, 9410470, 18820940]

約数ペア:

[(1, 18820940), (2, 9410470), (4, 4705235), (5, 3764188), (10, 1882094), (20, 941047), (61, 308540), (122, 154270), (244, 77135), (305, 61708), (610, 30854), (1220, 15427)]