20649968

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{79}}^1$

素因数の和:166

約数の個数: 60

約数和(自身を含む): 44327520

約数和(自身を除く): 23677552

約数列:

[1, 2, 4, 8, 16, 17, 31, 34, 62, 68, 79, 124, 136, 158, 248, 272, 316, 496, 527, 632, 961, 1054, 1264, 1343, 1922, 2108, 2449, 2686, 3844, 4216, 4898, 5372, 7688, 8432, 9796, 10744, 15376, 16337, 19592, 21488, 32674, 39184, 41633, 65348, 75919, 83266, 130696, 151838, 166532, 261392, 303676, 333064, 607352, 666128, 1214704, 1290623, 2581246, 5162492, 10324984, 20649968]

約数ペア:

[(1, 20649968), (2, 10324984), (4, 5162492), (8, 2581246), (16, 1290623), (17, 1214704), (31, 666128), (34, 607352), (62, 333064), (68, 303676), (79, 261392), (124, 166532), (136, 151838), (158, 130696), (248, 83266), (272, 75919), (316, 65348), (496, 41633), (527, 39184), (632, 32674), (961, 21488), (1054, 19592), (1264, 16337), (1343, 15376), (1922, 10744), (2108, 9796), (2449, 8432), (2686, 7688), (3844, 5372), (4216, 4898)]