128501840

素因数分解:

$2^4\times 5^1\times {\mathrm{1606273}}^1$

素因数の和:1606286

約数の個数: 20

約数和(自身を含む): 298766964

約数和(自身を除く): 170265124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606273, 3212546, 6425092, 8031365, 12850184, 16062730, 25700368, 32125460, 64250920, 128501840]

約数ペア:

[(1, 128501840), (2, 64250920), (4, 32125460), (5, 25700368), (8, 16062730), (10, 12850184), (16, 8031365), (20, 6425092), (40, 3212546), (80, 1606273)]