19728275

素因数分解:

$5^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1427}}^1$

素因数の和:1523

約数の個数: 24

約数和(自身を含む): 28331520

約数和(自身を除く): 8603245

約数列:

[1, 5, 7, 25, 35, 79, 175, 395, 553, 1427, 1975, 2765, 7135, 9989, 13825, 35675, 49945, 112733, 249725, 563665, 789131, 2818325, 3945655, 19728275]

約数ペア:

[(1, 19728275), (5, 3945655), (7, 2818325), (25, 789131), (35, 563665), (79, 249725), (175, 112733), (395, 49945), (553, 35675), (1427, 13825), (1975, 9989), (2765, 7135)]