19978525

素因数分解:

$5^2\times 7^2\times {\mathrm{47}}^1\times {\mathrm{347}}^1$

素因数の和:418

約数の個数: 36

約数和(自身を含む): 29515968

約数和(自身を除く): 9537443

約数列:

[1, 5, 7, 25, 35, 47, 49, 175, 235, 245, 329, 347, 1175, 1225, 1645, 1735, 2303, 2429, 8225, 8675, 11515, 12145, 16309, 17003, 57575, 60725, 81545, 85015, 114163, 407725, 425075, 570815, 799141, 2854075, 3995705, 19978525]

約数ペア:

[(1, 19978525), (5, 3995705), (7, 2854075), (25, 799141), (35, 570815), (47, 425075), (49, 407725), (175, 114163), (235, 85015), (245, 81545), (329, 60725), (347, 57575), (1175, 17003), (1225, 16309), (1645, 12145), (1735, 11515), (2303, 8675), (2429, 8225)]