129028400

素因数分解:

$2^4\times 5^2\times {\mathrm{322571}}^1$

素因数の和:322589

約数の個数: 30

約数和(自身を含む): 309991692

約数和(自身を除く): 180963292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 322571, 645142, 1290284, 1612855, 2580568, 3225710, 5161136, 6451420, 8064275, 12902840, 16128550, 25805680, 32257100, 64514200, 129028400]

約数ペア:

[(1, 129028400), (2, 64514200), (4, 32257100), (5, 25805680), (8, 16128550), (10, 12902840), (16, 8064275), (20, 6451420), (25, 5161136), (40, 3225710), (50, 2580568), (80, 1612855), (100, 1290284), (200, 645142), (400, 322571)]