21007063

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{1831}}^1$

素因数の和:1998

約数の個数: 16

約数和(自身を含む): 26380800

約数和(自身を除く): 5373737

約数列:

[1, 7, 11, 77, 149, 1043, 1639, 1831, 11473, 12817, 20141, 140987, 272819, 1909733, 3001009, 21007063]

約数ペア:

[(1, 21007063), (7, 3001009), (11, 1909733), (77, 272819), (149, 140987), (1043, 20141), (1639, 12817), (1831, 11473)]