201521720

素因数分解:

$2^3\times 5^1\times {\mathrm{5038043}}^1$

素因数の和:5038054

約数の個数: 16

約数和(自身を含む): 453423960

約数和(自身を除く): 251902240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 5038043, 10076086, 20152172, 25190215, 40304344, 50380430, 100760860, 201521720]

約数ペア:

[(1, 201521720), (2, 100760860), (4, 50380430), (5, 40304344), (8, 25190215), (10, 20152172), (20, 10076086), (40, 5038043)]