21510860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153649}}^1$

素因数の和:153665

約数の個数: 24

約数和(自身を含む): 51626400

約数和(自身を除く): 30115540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153649, 307298, 614596, 768245, 1075543, 1536490, 2151086, 3072980, 4302172, 5377715, 10755430, 21510860]

約数ペア:

[(1, 21510860), (2, 10755430), (4, 5377715), (5, 4302172), (7, 3072980), (10, 2151086), (14, 1536490), (20, 1075543), (28, 768245), (35, 614596), (70, 307298), (140, 153649)]