21125560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{661}}^1$

素因数の和:736

約数の個数: 64

約数和(自身を含む): 51477120

約数和(自身を除く): 30351560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 47, 68, 85, 94, 136, 170, 188, 235, 340, 376, 470, 661, 680, 799, 940, 1322, 1598, 1880, 2644, 3196, 3305, 3995, 5288, 6392, 6610, 7990, 11237, 13220, 15980, 22474, 26440, 31067, 31960, 44948, 56185, 62134, 89896, 112370, 124268, 155335, 224740, 248536, 310670, 449480, 528139, 621340, 1056278, 1242680, 2112556, 2640695, 4225112, 5281390, 10562780, 21125560]

約数ペア:

[(1, 21125560), (2, 10562780), (4, 5281390), (5, 4225112), (8, 2640695), (10, 2112556), (17, 1242680), (20, 1056278), (34, 621340), (40, 528139), (47, 449480), (68, 310670), (85, 248536), (94, 224740), (136, 155335), (170, 124268), (188, 112370), (235, 89896), (340, 62134), (376, 56185), (470, 44948), (661, 31960), (680, 31067), (799, 26440), (940, 22474), (1322, 15980), (1598, 13220), (1880, 11237), (2644, 7990), (3196, 6610), (3305, 6392), (3995, 5288)]