20952880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20147}}^1$

素因数の和:20173

約数の個数: 40

約数和(自身を含む): 52465392

約数和(自身を除く): 31512512

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20147, 40294, 80588, 100735, 161176, 201470, 261911, 322352, 402940, 523822, 805880, 1047644, 1309555, 1611760, 2095288, 2619110, 4190576, 5238220, 10476440, 20952880]

約数ペア:

[(1, 20952880), (2, 10476440), (4, 5238220), (5, 4190576), (8, 2619110), (10, 2095288), (13, 1611760), (16, 1309555), (20, 1047644), (26, 805880), (40, 523822), (52, 402940), (65, 322352), (80, 261911), (104, 201470), (130, 161176), (208, 100735), (260, 80588), (520, 40294), (1040, 20147)]