217487920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{209123}}^1$

素因数の和:209149

約数の個数: 40

約数和(自身を含む): 544558896

約数和(自身を除く): 327070976

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 209123, 418246, 836492, 1045615, 1672984, 2091230, 2718599, 3345968, 4182460, 5437198, 8364920, 10874396, 13592995, 16729840, 21748792, 27185990, 43497584, 54371980, 108743960, 217487920]

約数ペア:

[(1, 217487920), (2, 108743960), (4, 54371980), (5, 43497584), (8, 27185990), (10, 21748792), (13, 16729840), (16, 13592995), (20, 10874396), (26, 8364920), (40, 5437198), (52, 4182460), (65, 3345968), (80, 2718599), (104, 2091230), (130, 1672984), (208, 1045615), (260, 836492), (520, 418246), (1040, 209123)]