20564960

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9887}}^1$

素因数の和:9915

約数の個数: 48

約数和(自身を含む): 52327296

約数和(自身を除く): 31762336

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9887, 19774, 39548, 49435, 79096, 98870, 128531, 158192, 197740, 257062, 316384, 395480, 514124, 642655, 790960, 1028248, 1285310, 1581920, 2056496, 2570620, 4112992, 5141240, 10282480, 20564960]

約数ペア:

[(1, 20564960), (2, 10282480), (4, 5141240), (5, 4112992), (8, 2570620), (10, 2056496), (13, 1581920), (16, 1285310), (20, 1028248), (26, 790960), (32, 642655), (40, 514124), (52, 395480), (65, 316384), (80, 257062), (104, 197740), (130, 158192), (160, 128531), (208, 98870), (260, 79096), (416, 49435), (520, 39548), (1040, 19774), (2080, 9887)]