21581521

素因数分解:

${\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{811}}^1$

素因数の和:936

約数の個数: 16

約数和(自身を含む): 24554880

約数和(自身を除く): 2973359

約数列:

[1, 13, 23, 89, 299, 811, 1157, 2047, 10543, 18653, 26611, 72179, 242489, 938327, 1660117, 21581521]

約数ペア:

[(1, 21581521), (13, 1660117), (23, 938327), (89, 242489), (299, 72179), (811, 26611), (1157, 18653), (2047, 10543)]