18389320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11213}}^1$

素因数の和:11265

約数の個数: 32

約数和(自身を含む): 42388920

約数和(自身を除く): 23999600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11213, 22426, 44852, 56065, 89704, 112130, 224260, 448520, 459733, 919466, 1838932, 2298665, 3677864, 4597330, 9194660, 18389320]

約数ペア:

[(1, 18389320), (2, 9194660), (4, 4597330), (5, 3677864), (8, 2298665), (10, 1838932), (20, 919466), (40, 459733), (41, 448520), (82, 224260), (164, 112130), (205, 89704), (328, 56065), (410, 44852), (820, 22426), (1640, 11213)]