21499723

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{239}}^1$

素因数の和:498

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 3659957

約数列:

[1, 7, 71, 181, 239, 497, 1267, 1673, 12851, 16969, 43259, 89957, 118783, 302813, 3071389, 21499723]

約数ペア:

[(1, 21499723), (7, 3071389), (71, 302813), (181, 118783), (239, 89957), (497, 43259), (1267, 16969), (1673, 12851)]