201581680

素因数分解:

$2^4\times 5^1\times {\mathrm{641}}^1\times {\mathrm{3931}}^1$

素因数の和:4585

約数の個数: 40

約数和(自身を含む): 469527984

約数和(自身を除く): 267946304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 641, 1282, 2564, 3205, 3931, 5128, 6410, 7862, 10256, 12820, 15724, 19655, 25640, 31448, 39310, 51280, 62896, 78620, 157240, 314480, 2519771, 5039542, 10079084, 12598855, 20158168, 25197710, 40316336, 50395420, 100790840, 201581680]

約数ペア:

[(1, 201581680), (2, 100790840), (4, 50395420), (5, 40316336), (8, 25197710), (10, 20158168), (16, 12598855), (20, 10079084), (40, 5039542), (80, 2519771), (641, 314480), (1282, 157240), (2564, 78620), (3205, 62896), (3931, 51280), (5128, 39310), (6410, 31448), (7862, 25640), (10256, 19655), (12820, 15724)]