20878215

素因数分解:

$3^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{13781}}^1$

素因数の和:13890

約数の個数: 16

約数和(自身を含む): 33738336

約数和(自身を除く): 12860121

約数列:

[1, 3, 5, 15, 101, 303, 505, 1515, 13781, 41343, 68905, 206715, 1391881, 4175643, 6959405, 20878215]

約数ペア:

[(1, 20878215), (3, 6959405), (5, 4175643), (15, 1391881), (101, 206715), (303, 68905), (505, 41343), (1515, 13781)]