21451909

素因数分解:

${\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{821}}^1$

素因数の和:920

約数の個数: 16

約数和(自身を含む): 23969520

約数和(自身を除く): 2517611

約数列:

[1, 17, 29, 53, 493, 821, 901, 1537, 13957, 23809, 26129, 43513, 404753, 739721, 1261877, 21451909]

約数ペア:

[(1, 21451909), (17, 1261877), (29, 739721), (53, 404753), (493, 43513), (821, 26129), (901, 23809), (1537, 13957)]