21780403

素因数分解:

${\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{503}}^1$

素因数の和:618

約数の個数: 16

約数和(自身を含む): 23950080

約数和(自身を除く): 2169677

約数列:

[1, 19, 43, 53, 503, 817, 1007, 2279, 9557, 21629, 26659, 43301, 410951, 506521, 1146337, 21780403]

約数ペア:

[(1, 21780403), (19, 1146337), (43, 506521), (53, 410951), (503, 43301), (817, 26659), (1007, 21629), (2279, 9557)]