20662840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{311}}^1$

素因数の和:484

約数の個数: 64

約数和(自身を含む): 51217920

約数和(自身を除く): 30555080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 151, 220, 302, 311, 440, 604, 622, 755, 1208, 1244, 1510, 1555, 1661, 2488, 3020, 3110, 3322, 3421, 6040, 6220, 6644, 6842, 8305, 12440, 13288, 13684, 16610, 17105, 27368, 33220, 34210, 46961, 66440, 68420, 93922, 136840, 187844, 234805, 375688, 469610, 516571, 939220, 1033142, 1878440, 2066284, 2582855, 4132568, 5165710, 10331420, 20662840]

約数ペア:

[(1, 20662840), (2, 10331420), (4, 5165710), (5, 4132568), (8, 2582855), (10, 2066284), (11, 1878440), (20, 1033142), (22, 939220), (40, 516571), (44, 469610), (55, 375688), (88, 234805), (110, 187844), (151, 136840), (220, 93922), (302, 68420), (311, 66440), (440, 46961), (604, 34210), (622, 33220), (755, 27368), (1208, 17105), (1244, 16610), (1510, 13684), (1555, 13288), (1661, 12440), (2488, 8305), (3020, 6842), (3110, 6644), (3322, 6220), (3421, 6040)]