21110804

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{167}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 46484928

約数和(自身を除く): 25374124

約数列:

[1, 2, 4, 11, 13, 17, 22, 26, 34, 44, 52, 68, 143, 167, 169, 187, 221, 286, 334, 338, 374, 442, 572, 668, 676, 748, 884, 1837, 1859, 2171, 2431, 2839, 2873, 3674, 3718, 4342, 4862, 5678, 5746, 7348, 7436, 8684, 9724, 11356, 11492, 23881, 28223, 31229, 31603, 36907, 47762, 56446, 62458, 63206, 73814, 95524, 112892, 124916, 126412, 147628, 310453, 405977, 479791, 620906, 811954, 959582, 1241812, 1623908, 1919164, 5277701, 10555402, 21110804]

約数ペア:

[(1, 21110804), (2, 10555402), (4, 5277701), (11, 1919164), (13, 1623908), (17, 1241812), (22, 959582), (26, 811954), (34, 620906), (44, 479791), (52, 405977), (68, 310453), (143, 147628), (167, 126412), (169, 124916), (187, 112892), (221, 95524), (286, 73814), (334, 63206), (338, 62458), (374, 56446), (442, 47762), (572, 36907), (668, 31603), (676, 31229), (748, 28223), (884, 23881), (1837, 11492), (1859, 11356), (2171, 9724), (2431, 8684), (2839, 7436), (2873, 7348), (3674, 5746), (3718, 5678), (4342, 4862)]