21420585

素因数分解:

$3^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1571}}^1$

素因数の和:1686

約数の個数: 32

約数和(自身を含む): 38482560

約数和(自身を除く): 17061975

約数列:

[1, 3, 5, 9, 15, 27, 45, 101, 135, 303, 505, 909, 1515, 1571, 2727, 4545, 4713, 7855, 13635, 14139, 23565, 42417, 70695, 158671, 212085, 476013, 793355, 1428039, 2380065, 4284117, 7140195, 21420585]

約数ペア:

[(1, 21420585), (3, 7140195), (5, 4284117), (9, 2380065), (15, 1428039), (27, 793355), (45, 476013), (101, 212085), (135, 158671), (303, 70695), (505, 42417), (909, 23565), (1515, 14139), (1571, 13635), (2727, 7855), (4545, 4713)]