19885220

素因数分解:

$2^2\times 5^1\times {\mathrm{809}}^1\times {\mathrm{1229}}^1$

素因数の和:2047

約数の個数: 24

約数和(自身を含む): 41844600

約数和(自身を除く): 21959380

約数列:

[1, 2, 4, 5, 10, 20, 809, 1229, 1618, 2458, 3236, 4045, 4916, 6145, 8090, 12290, 16180, 24580, 994261, 1988522, 3977044, 4971305, 9942610, 19885220]

約数ペア:

[(1, 19885220), (2, 9942610), (4, 4971305), (5, 3977044), (10, 1988522), (20, 994261), (809, 24580), (1229, 16180), (1618, 12290), (2458, 8090), (3236, 6145), (4045, 4916)]