21100508

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{997}}^1$

素因数の和:1062

約数の個数: 48

約数和(自身を含む): 44598624

約数和(自身を除く): 23498116

約数列:

[1, 2, 4, 11, 13, 22, 26, 37, 44, 52, 74, 143, 148, 286, 407, 481, 572, 814, 962, 997, 1628, 1924, 1994, 3988, 5291, 10582, 10967, 12961, 21164, 21934, 25922, 36889, 43868, 51844, 73778, 142571, 147556, 285142, 405779, 479557, 570284, 811558, 959114, 1623116, 1918228, 5275127, 10550254, 21100508]

約数ペア:

[(1, 21100508), (2, 10550254), (4, 5275127), (11, 1918228), (13, 1623116), (22, 959114), (26, 811558), (37, 570284), (44, 479557), (52, 405779), (74, 285142), (143, 147556), (148, 142571), (286, 73778), (407, 51844), (481, 43868), (572, 36889), (814, 25922), (962, 21934), (997, 21164), (1628, 12961), (1924, 10967), (1994, 10582), (3988, 5291)]