21781970

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{44453}}^1$

素因数の和:44474

約数の個数: 24

約数和(自身を含む): 45609804

約数和(自身を除く): 23827834

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 44453, 88906, 222265, 311171, 444530, 622342, 1555855, 2178197, 3111710, 4356394, 10890985, 21781970]

約数ペア:

[(1, 21781970), (2, 10890985), (5, 4356394), (7, 3111710), (10, 2178197), (14, 1555855), (35, 622342), (49, 444530), (70, 311171), (98, 222265), (245, 88906), (490, 44453)]