20779640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1579}}^1$

素因数の和:1644

約数の個数: 64

約数和(自身を含む): 54604800

約数和(自身を除く): 33825160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 47, 56, 70, 94, 140, 188, 235, 280, 329, 376, 470, 658, 940, 1316, 1579, 1645, 1880, 2632, 3158, 3290, 6316, 6580, 7895, 11053, 12632, 13160, 15790, 22106, 31580, 44212, 55265, 63160, 74213, 88424, 110530, 148426, 221060, 296852, 371065, 442120, 519491, 593704, 742130, 1038982, 1484260, 2077964, 2597455, 2968520, 4155928, 5194910, 10389820, 20779640]

約数ペア:

[(1, 20779640), (2, 10389820), (4, 5194910), (5, 4155928), (7, 2968520), (8, 2597455), (10, 2077964), (14, 1484260), (20, 1038982), (28, 742130), (35, 593704), (40, 519491), (47, 442120), (56, 371065), (70, 296852), (94, 221060), (140, 148426), (188, 110530), (235, 88424), (280, 74213), (329, 63160), (376, 55265), (470, 44212), (658, 31580), (940, 22106), (1316, 15790), (1579, 13160), (1645, 12632), (1880, 11053), (2632, 7895), (3158, 6580), (3290, 6316)]