1292440

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{409}}^1$

素因数の和:499

約数の個数: 32

約数和(自身を含む): 2952000

約数和(自身を除く): 1659560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 409, 632, 790, 818, 1580, 1636, 2045, 3160, 3272, 4090, 8180, 16360, 32311, 64622, 129244, 161555, 258488, 323110, 646220, 1292440]

約数ペア:

[(1, 1292440), (2, 646220), (4, 323110), (5, 258488), (8, 161555), (10, 129244), (20, 64622), (40, 32311), (79, 16360), (158, 8180), (316, 4090), (395, 3272), (409, 3160), (632, 2045), (790, 1636), (818, 1580)]