128542840

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{10267}}^1$

素因数の和:10591

約数の個数: 32

約数和(自身を含む): 290173680

約数和(自身を除く): 161630840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 2504, 3130, 6260, 10267, 12520, 20534, 41068, 51335, 82136, 102670, 205340, 410680, 3213571, 6427142, 12854284, 16067855, 25708568, 32135710, 64271420, 128542840]

約数ペア:

[(1, 128542840), (2, 64271420), (4, 32135710), (5, 25708568), (8, 16067855), (10, 12854284), (20, 6427142), (40, 3213571), (313, 410680), (626, 205340), (1252, 102670), (1565, 82136), (2504, 51335), (3130, 41068), (6260, 20534), (10267, 12520)]