21457555

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:859

約数の個数: 32

約数和(自身を含む): 31772160

約数和(自身を除く): 10314605

約数列:

[1, 5, 7, 19, 35, 41, 95, 133, 205, 287, 665, 779, 787, 1435, 3895, 3935, 5453, 5509, 14953, 27265, 27545, 32267, 74765, 104671, 161335, 225869, 523355, 613073, 1129345, 3065365, 4291511, 21457555]

約数ペア:

[(1, 21457555), (5, 4291511), (7, 3065365), (19, 1129345), (35, 613073), (41, 523355), (95, 225869), (133, 161335), (205, 104671), (287, 74765), (665, 32267), (779, 27545), (787, 27265), (1435, 14953), (3895, 5509), (3935, 5453)]