21840135

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{23869}}^1$

素因数の和:23938

約数の個数: 16

約数和(自身を含む): 35518560

約数和(自身を除く): 13678425

約数列:

[1, 3, 5, 15, 61, 183, 305, 915, 23869, 71607, 119345, 358035, 1456009, 4368027, 7280045, 21840135]

約数ペア:

[(1, 21840135), (3, 7280045), (5, 4368027), (15, 1456009), (61, 358035), (183, 119345), (305, 71607), (915, 23869)]