20785996

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{311}}^1$

素因数の和:371

約数の個数: 72

約数和(自身を含む): 47803392

約数和(自身を除く): 27017396

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 31, 44, 49, 62, 77, 98, 124, 154, 196, 217, 308, 311, 341, 434, 539, 622, 682, 868, 1078, 1244, 1364, 1519, 2156, 2177, 2387, 3038, 3421, 4354, 4774, 6076, 6842, 8708, 9548, 9641, 13684, 15239, 16709, 19282, 23947, 30478, 33418, 38564, 47894, 60956, 66836, 67487, 95788, 106051, 134974, 167629, 212102, 269948, 335258, 424204, 472409, 670516, 742357, 944818, 1484714, 1889636, 2969428, 5196499, 10392998, 20785996]

約数ペア:

[(1, 20785996), (2, 10392998), (4, 5196499), (7, 2969428), (11, 1889636), (14, 1484714), (22, 944818), (28, 742357), (31, 670516), (44, 472409), (49, 424204), (62, 335258), (77, 269948), (98, 212102), (124, 167629), (154, 134974), (196, 106051), (217, 95788), (308, 67487), (311, 66836), (341, 60956), (434, 47894), (539, 38564), (622, 33418), (682, 30478), (868, 23947), (1078, 19282), (1244, 16709), (1364, 15239), (1519, 13684), (2156, 9641), (2177, 9548), (2387, 8708), (3038, 6842), (3421, 6076), (4354, 4774)]