809508520

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{116981}}^1$

素因数の和:117165

約数の個数: 32

約数和(自身を含む): 1831938120

約数和(自身を除く): 1022429600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3460, 6920, 116981, 233962, 467924, 584905, 935848, 1169810, 2339620, 4679240, 20237713, 40475426, 80950852, 101188565, 161901704, 202377130, 404754260, 809508520]

約数ペア:

[(1, 809508520), (2, 404754260), (4, 202377130), (5, 161901704), (8, 101188565), (10, 80950852), (20, 40475426), (40, 20237713), (173, 4679240), (346, 2339620), (692, 1169810), (865, 935848), (1384, 584905), (1730, 467924), (3460, 233962), (6920, 116981)]