21459921

素因数分解:

$3^1\times 7^1\times {\mathrm{431}}^1\times {\mathrm{2371}}^1$

素因数の和:2812

約数の個数: 16

約数和(自身を含む): 32790528

約数和(自身を除く): 11330607

約数列:

[1, 3, 7, 21, 431, 1293, 2371, 3017, 7113, 9051, 16597, 49791, 1021901, 3065703, 7153307, 21459921]

約数ペア:

[(1, 21459921), (3, 7153307), (7, 3065703), (21, 1021901), (431, 49791), (1293, 16597), (2371, 9051), (3017, 7113)]