20927920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20123}}^1$

素因数の和:20149

約数の個数: 40

約数和(自身を含む): 52402896

約数和(自身を除く): 31474976

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20123, 40246, 80492, 100615, 160984, 201230, 261599, 321968, 402460, 523198, 804920, 1046396, 1307995, 1609840, 2092792, 2615990, 4185584, 5231980, 10463960, 20927920]

約数ペア:

[(1, 20927920), (2, 10463960), (4, 5231980), (5, 4185584), (8, 2615990), (10, 2092792), (13, 1609840), (16, 1307995), (20, 1046396), (26, 804920), (40, 523198), (52, 402460), (65, 321968), (80, 261599), (104, 201230), (130, 160984), (208, 100615), (260, 80492), (520, 40246), (1040, 20123)]