647501920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{311299}}^1$

素因数の和:311327

約数の個数: 48

約数和(自身を含む): 1647399600

約数和(自身を除く): 999897680

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, 311299, 622598, 1245196, 1556495, 2490392, 3112990, 4046887, 4980784, 6225980, 8093774, 9961568, 12451960, 16187548, 20234435, 24903920, 32375096, 40468870, 49807840, 64750192, 80937740, 129500384, 161875480, 323750960, 647501920]

約数ペア:

[(1, 647501920), (2, 323750960), (4, 161875480), (5, 129500384), (8, 80937740), (10, 64750192), (13, 49807840), (16, 40468870), (20, 32375096), (26, 24903920), (32, 20234435), (40, 16187548), (52, 12451960), (65, 9961568), (80, 8093774), (104, 6225980), (130, 4980784), (160, 4046887), (208, 3112990), (260, 2490392), (416, 1556495), (520, 1245196), (1040, 622598), (2080, 311299)]