20748640

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11789}}^1$

素因数の和:11815

約数の個数: 48

約数和(自身を含む): 53479440

約数和(自身を除く): 32730800

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11789, 23578, 47156, 58945, 94312, 117890, 129679, 188624, 235780, 259358, 377248, 471560, 518716, 648395, 943120, 1037432, 1296790, 1886240, 2074864, 2593580, 4149728, 5187160, 10374320, 20748640]

約数ペア:

[(1, 20748640), (2, 10374320), (4, 5187160), (5, 4149728), (8, 2593580), (10, 2074864), (11, 1886240), (16, 1296790), (20, 1037432), (22, 943120), (32, 648395), (40, 518716), (44, 471560), (55, 377248), (80, 259358), (88, 235780), (110, 188624), (160, 129679), (176, 117890), (220, 94312), (352, 58945), (440, 47156), (880, 23578), (1760, 11789)]