64630180

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{7901}}^1$

素因数の和:8319

約数の個数: 24

約数和(自身を含む): 136072440

約数和(自身を除く): 71442260

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 7901, 8180, 15802, 31604, 39505, 79010, 158020, 3231509, 6463018, 12926036, 16157545, 32315090, 64630180]

約数ペア:

[(1, 64630180), (2, 32315090), (4, 16157545), (5, 12926036), (10, 6463018), (20, 3231509), (409, 158020), (818, 79010), (1636, 39505), (2045, 31604), (4090, 15802), (7901, 8180)]