21078405

素因数分解:

$3^2\times 5^1\times {\mathrm{383}}^1\times {\mathrm{1223}}^1$

素因数の和:1617

約数の個数: 24

約数和(自身を含む): 36661248

約数和(自身を除く): 15582843

約数列:

[1, 3, 5, 9, 15, 45, 383, 1149, 1223, 1915, 3447, 3669, 5745, 6115, 11007, 17235, 18345, 55035, 468409, 1405227, 2342045, 4215681, 7026135, 21078405]

約数ペア:

[(1, 21078405), (3, 7026135), (5, 4215681), (9, 2342045), (15, 1405227), (45, 468409), (383, 55035), (1149, 18345), (1223, 17235), (1915, 11007), (3447, 6115), (3669, 5745)]