21645978

素因数分解:

$2^1\times 3^1\times {\mathrm{19}}^1\times {\mathrm{189877}}^1$

素因数の和:189901

約数の個数: 16

約数和(自身を含む): 45570720

約数和(自身を除く): 23924742

約数列:

[1, 2, 3, 6, 19, 38, 57, 114, 189877, 379754, 569631, 1139262, 3607663, 7215326, 10822989, 21645978]

約数ペア:

[(1, 21645978), (2, 10822989), (3, 7215326), (6, 3607663), (19, 1139262), (38, 569631), (57, 379754), (114, 189877)]