660020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{541}}^1$

素因数の和:611

約数の個数: 24

約数和(自身を含む): 1411368

約数和(自身を除く): 751348

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 541, 610, 1082, 1220, 2164, 2705, 5410, 10820, 33001, 66002, 132004, 165005, 330010, 660020]

約数ペア:

[(1, 660020), (2, 330010), (4, 165005), (5, 132004), (10, 66002), (20, 33001), (61, 10820), (122, 5410), (244, 2705), (305, 2164), (541, 1220), (610, 1082)]