128437420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{156631}}^1$

素因数の和:156681

約数の個数: 24

約数和(自身を含む): 276298848

約数和(自身を除く): 147861428

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 156631, 313262, 626524, 783155, 1566310, 3132620, 6421871, 12843742, 25687484, 32109355, 64218710, 128437420]

約数ペア:

[(1, 128437420), (2, 64218710), (4, 32109355), (5, 25687484), (10, 12843742), (20, 6421871), (41, 3132620), (82, 1566310), (164, 783155), (205, 626524), (410, 313262), (820, 156631)]