19901875

素因数分解:

$5^4\times 7^1\times {\mathrm{4549}}^1$

素因数の和:4576

約数の個数: 20

約数和(自身を含む): 28428400

約数和(自身を除く): 8526525

約数列:

[1, 5, 7, 25, 35, 125, 175, 625, 875, 4375, 4549, 22745, 31843, 113725, 159215, 568625, 796075, 2843125, 3980375, 19901875]

約数ペア:

[(1, 19901875), (5, 3980375), (7, 2843125), (25, 796075), (35, 568625), (125, 159215), (175, 113725), (625, 31843), (875, 22745), (4375, 4549)]