20106905

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 31026240

約数和(自身を除く): 10919335

約数列:

[1, 5, 7, 13, 35, 49, 59, 65, 91, 107, 245, 295, 413, 455, 535, 637, 749, 767, 1391, 2065, 2891, 3185, 3745, 3835, 5243, 5369, 6313, 6955, 9737, 14455, 26215, 26845, 31565, 37583, 44191, 48685, 68159, 82069, 187915, 220955, 309337, 340795, 410345, 574483, 1546685, 2872415, 4021381, 20106905]

約数ペア:

[(1, 20106905), (5, 4021381), (7, 2872415), (13, 1546685), (35, 574483), (49, 410345), (59, 340795), (65, 309337), (91, 220955), (107, 187915), (245, 82069), (295, 68159), (413, 48685), (455, 44191), (535, 37583), (637, 31565), (749, 26845), (767, 26215), (1391, 14455), (2065, 9737), (2891, 6955), (3185, 6313), (3745, 5369), (3835, 5243)]