21418515

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11069}}^1$

素因数の和:11123

約数の個数: 24

約数和(自身を含む): 37992240

約数和(自身を除く): 16573725

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11069, 33207, 55345, 99621, 166035, 475967, 498105, 1427901, 2379835, 4283703, 7139505, 21418515]

約数ペア:

[(1, 21418515), (3, 7139505), (5, 4283703), (9, 2379835), (15, 1427901), (43, 498105), (45, 475967), (129, 166035), (215, 99621), (387, 55345), (645, 33207), (1935, 11069)]