21394978

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{211}}^1\times {\mathrm{419}}^1$

素因数の和:654

約数の個数: 24

約数和(自身を含む): 35526960

約数和(自身を除く): 14131982

約数列:

[1, 2, 11, 22, 121, 211, 242, 419, 422, 838, 2321, 4609, 4642, 9218, 25531, 50699, 51062, 88409, 101398, 176818, 972499, 1944998, 10697489, 21394978]

約数ペア:

[(1, 21394978), (2, 10697489), (11, 1944998), (22, 972499), (121, 176818), (211, 101398), (242, 88409), (419, 51062), (422, 50699), (838, 25531), (2321, 9218), (4609, 4642)]