21000000604

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{398059}}^1$

素因数の和:398194

約数の個数: 36

約数和(自身を含む): 40765324600

約数和(自身を除く): 19765323996

約数列:

[1, 2, 4, 11, 22, 44, 109, 121, 218, 242, 436, 484, 1199, 2398, 4796, 13189, 26378, 52756, 398059, 796118, 1592236, 4378649, 8757298, 17514596, 43388431, 48165139, 86776862, 96330278, 173553724, 192660556, 477272741, 954545482, 1909090964, 5250000151, 10500000302, 21000000604]

約数ペア:

[(1, 21000000604), (2, 10500000302), (4, 5250000151), (11, 1909090964), (22, 954545482), (44, 477272741), (109, 192660556), (121, 173553724), (218, 96330278), (242, 86776862), (436, 48165139), (484, 43388431), (1199, 17514596), (2398, 8757298), (4796, 4378649), (13189, 1592236), (26378, 796118), (52756, 398059)]