19972225

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8779}}^1$

素因数の和:8809

約数の個数: 24

約数和(自身を含む): 30484160

約数和(自身を除く): 10511935

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 8779, 43895, 61453, 114127, 219475, 307265, 570635, 798889, 1536325, 2853175, 3994445, 19972225]

約数ペア:

[(1, 19972225), (5, 3994445), (7, 2853175), (13, 1536325), (25, 798889), (35, 570635), (65, 307265), (91, 219475), (175, 114127), (325, 61453), (455, 43895), (2275, 8779)]