20719240

素因数分解:

$2^3\times 5^1\times {\mathrm{517981}}^1$

素因数の和:517992

約数の個数: 16

約数和(自身を含む): 46618380

約数和(自身を除く): 25899140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 517981, 1035962, 2071924, 2589905, 4143848, 5179810, 10359620, 20719240]

約数ペア:

[(1, 20719240), (2, 10359620), (4, 5179810), (5, 4143848), (8, 2589905), (10, 2071924), (20, 1035962), (40, 517981)]