21423451

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{2687}}^1$

素因数の和:2778

約数の個数: 16

約数和(自身を含む): 26320896

約数和(自身を除く): 4897445

約数列:

[1, 7, 17, 67, 119, 469, 1139, 2687, 7973, 18809, 45679, 180029, 319753, 1260203, 3060493, 21423451]

約数ペア:

[(1, 21423451), (7, 3060493), (17, 1260203), (67, 319753), (119, 180029), (469, 45679), (1139, 18809), (2687, 7973)]