21390754

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19843}}^1$

素因数の和:19870

約数の個数: 24

約数和(自身を含む): 40719888

約数和(自身を除く): 19329134

約数列:

[1, 2, 7, 11, 14, 22, 49, 77, 98, 154, 539, 1078, 19843, 39686, 138901, 218273, 277802, 436546, 972307, 1527911, 1944614, 3055822, 10695377, 21390754]

約数ペア:

[(1, 21390754), (2, 10695377), (7, 3055822), (11, 1944614), (14, 1527911), (22, 972307), (49, 436546), (77, 277802), (98, 218273), (154, 138901), (539, 39686), (1078, 19843)]