21270021

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 30844800

約数和(自身を除く): 9574779

約数列:

[1, 3, 29, 41, 67, 87, 89, 123, 201, 267, 1189, 1943, 2581, 2747, 3567, 3649, 5829, 5963, 7743, 8241, 10947, 17889, 79663, 105821, 172927, 238989, 244483, 317463, 518781, 733449, 7090007, 21270021]

約数ペア:

[(1, 21270021), (3, 7090007), (29, 733449), (41, 518781), (67, 317463), (87, 244483), (89, 238989), (123, 172927), (201, 105821), (267, 79663), (1189, 17889), (1943, 10947), (2581, 8241), (2747, 7743), (3567, 5963), (3649, 5829)]