78359980

素因数分解:

$2^2\times 5^1\times {\mathrm{1931}}^1\times {\mathrm{2029}}^1$

素因数の和:3969

約数の個数: 24

約数和(自身を含む): 164722320

約数和(自身を除く): 86362340

約数列:

[1, 2, 4, 5, 10, 20, 1931, 2029, 3862, 4058, 7724, 8116, 9655, 10145, 19310, 20290, 38620, 40580, 3917999, 7835998, 15671996, 19589995, 39179990, 78359980]

約数ペア:

[(1, 78359980), (2, 39179990), (4, 19589995), (5, 15671996), (10, 7835998), (20, 3917999), (1931, 40580), (2029, 38620), (3862, 20290), (4058, 19310), (7724, 10145), (8116, 9655)]