128891600

素因数分解:

$2^4\times 5^2\times {\mathrm{322229}}^1$

素因数の和:322247

約数の個数: 30

約数和(自身を含む): 309663030

約数和(自身を除く): 180771430

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 322229, 644458, 1288916, 1611145, 2577832, 3222290, 5155664, 6444580, 8055725, 12889160, 16111450, 25778320, 32222900, 64445800, 128891600]

約数ペア:

[(1, 128891600), (2, 64445800), (4, 32222900), (5, 25778320), (8, 16111450), (10, 12889160), (16, 8055725), (20, 6444580), (25, 5155664), (40, 3222290), (50, 2577832), (80, 1611145), (100, 1288916), (200, 644458), (400, 322229)]