21015351

素因数分解:

$3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{4019}}^1$

素因数の和:4115

約数の個数: 24

約数和(自身を含む): 35118720

約数和(自身を除く): 14103369

約数列:

[1, 3, 7, 9, 21, 63, 83, 249, 581, 747, 1743, 4019, 5229, 12057, 28133, 36171, 84399, 253197, 333577, 1000731, 2335039, 3002193, 7005117, 21015351]

約数ペア:

[(1, 21015351), (3, 7005117), (7, 3002193), (9, 2335039), (21, 1000731), (63, 333577), (83, 253197), (249, 84399), (581, 36171), (747, 28133), (1743, 12057), (4019, 5229)]