20912216

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{233}}^1\times {\mathrm{863}}^1$

素因数の和:1115

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 21544744

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 233, 466, 863, 932, 1726, 1864, 3029, 3452, 6058, 6904, 11219, 12116, 22438, 24232, 44876, 89752, 201079, 402158, 804316, 1608632, 2614027, 5228054, 10456108, 20912216]

約数ペア:

[(1, 20912216), (2, 10456108), (4, 5228054), (8, 2614027), (13, 1608632), (26, 804316), (52, 402158), (104, 201079), (233, 89752), (466, 44876), (863, 24232), (932, 22438), (1726, 12116), (1864, 11219), (3029, 6904), (3452, 6058)]