21105865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{1063}}^1$

素因数の和:1117

約数の個数: 24

約数和(自身を含む): 29187648

約数和(自身を除く): 8081783

約数列:

[1, 5, 11, 19, 55, 95, 209, 361, 1045, 1063, 1805, 3971, 5315, 11693, 19855, 20197, 58465, 100985, 222167, 383743, 1110835, 1918715, 4221173, 21105865]

約数ペア:

[(1, 21105865), (5, 4221173), (11, 1918715), (19, 1110835), (55, 383743), (95, 222167), (209, 100985), (361, 58465), (1045, 20197), (1063, 19855), (1805, 11693), (3971, 5315)]