21497847

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{947}}^1$

素因数の和:1027

約数の個数: 32

約数和(自身を含む): 34947072

約数和(自身を除く): 13449225

約数列:

[1, 3, 7, 21, 23, 47, 69, 141, 161, 329, 483, 947, 987, 1081, 2841, 3243, 6629, 7567, 19887, 21781, 22701, 44509, 65343, 133527, 152467, 311563, 457401, 934689, 1023707, 3071121, 7165949, 21497847]

約数ペア:

[(1, 21497847), (3, 7165949), (7, 3071121), (21, 1023707), (23, 934689), (47, 457401), (69, 311563), (141, 152467), (161, 133527), (329, 65343), (483, 44509), (947, 22701), (987, 21781), (1081, 19887), (2841, 7567), (3243, 6629)]