21139976

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1087}}^1$

素因数の和:1134

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28211704

約数列:

[1, 2, 4, 8, 11, 13, 17, 22, 26, 34, 44, 52, 68, 88, 104, 136, 143, 187, 221, 286, 374, 442, 572, 748, 884, 1087, 1144, 1496, 1768, 2174, 2431, 4348, 4862, 8696, 9724, 11957, 14131, 18479, 19448, 23914, 28262, 36958, 47828, 56524, 73916, 95656, 113048, 147832, 155441, 203269, 240227, 310882, 406538, 480454, 621764, 813076, 960908, 1243528, 1626152, 1921816, 2642497, 5284994, 10569988, 21139976]

約数ペア:

[(1, 21139976), (2, 10569988), (4, 5284994), (8, 2642497), (11, 1921816), (13, 1626152), (17, 1243528), (22, 960908), (26, 813076), (34, 621764), (44, 480454), (52, 406538), (68, 310882), (88, 240227), (104, 203269), (136, 155441), (143, 147832), (187, 113048), (221, 95656), (286, 73916), (374, 56524), (442, 47828), (572, 36958), (748, 28262), (884, 23914), (1087, 19448), (1144, 18479), (1496, 14131), (1768, 11957), (2174, 9724), (2431, 8696), (4348, 4862)]