21005735

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{5393}}^1$

素因数の和:5458

約数の個数: 16

約数和(自身を含む): 27185760

約数和(自身を除く): 6180025

約数列:

[1, 5, 19, 41, 95, 205, 779, 3895, 5393, 26965, 102467, 221113, 512335, 1105565, 4201147, 21005735]

約数ペア:

[(1, 21005735), (5, 4201147), (19, 1105565), (41, 512335), (95, 221113), (205, 102467), (779, 26965), (3895, 5393)]