21015585

素因数分解:

$3^3\times 5^1\times {\mathrm{155671}}^1$

素因数の和:155685

約数の個数: 16

約数和(自身を含む): 37361280

約数和(自身を除く): 16345695

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155671, 467013, 778355, 1401039, 2335065, 4203117, 7005195, 21015585]

約数ペア:

[(1, 21015585), (3, 7005195), (5, 4203117), (9, 2335065), (15, 1401039), (27, 778355), (45, 467013), (135, 155671)]