21498491

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{1993}}^1$

素因数の和:2090

約数の個数: 16

約数和(自身を含む): 26033664

約数和(自身を除く): 4535173

約数列:

[1, 7, 23, 67, 161, 469, 1541, 1993, 10787, 13951, 45839, 133531, 320873, 934717, 3071213, 21498491]

約数ペア:

[(1, 21498491), (7, 3071213), (23, 934717), (67, 320873), (161, 133531), (469, 45839), (1541, 13951), (1993, 10787)]