81751880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291971}}^1$

素因数の和:291989

約数の個数: 32

約数和(自身を含む): 210219840

約数和(自身を除く): 128467960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291971, 583942, 1167884, 1459855, 2043797, 2335768, 2919710, 4087594, 5839420, 8175188, 10218985, 11678840, 16350376, 20437970, 40875940, 81751880]

約数ペア:

[(1, 81751880), (2, 40875940), (4, 20437970), (5, 16350376), (7, 11678840), (8, 10218985), (10, 8175188), (14, 5839420), (20, 4087594), (28, 2919710), (35, 2335768), (40, 2043797), (56, 1459855), (70, 1167884), (140, 583942), (280, 291971)]