21845564

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:246

約数の個数: 48

約数和(自身を含む): 42872256

約数和(自身を除く): 21026692

約数列:

[1, 2, 4, 13, 26, 52, 61, 71, 97, 122, 142, 194, 244, 284, 388, 793, 923, 1261, 1586, 1846, 2522, 3172, 3692, 4331, 5044, 5917, 6887, 8662, 11834, 13774, 17324, 23668, 27548, 56303, 76921, 89531, 112606, 153842, 179062, 225212, 307684, 358124, 420107, 840214, 1680428, 5461391, 10922782, 21845564]

約数ペア:

[(1, 21845564), (2, 10922782), (4, 5461391), (13, 1680428), (26, 840214), (52, 420107), (61, 358124), (71, 307684), (97, 225212), (122, 179062), (142, 153842), (194, 112606), (244, 89531), (284, 76921), (388, 56303), (793, 27548), (923, 23668), (1261, 17324), (1586, 13774), (1846, 11834), (2522, 8662), (3172, 6887), (3692, 5917), (4331, 5044)]