78905620

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{457}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 169661520

約数和(自身を除く): 90755900

約数列:

[1, 2, 4, 5, 10, 20, 89, 97, 178, 194, 356, 388, 445, 457, 485, 890, 914, 970, 1780, 1828, 1940, 2285, 4570, 8633, 9140, 17266, 34532, 40673, 43165, 44329, 81346, 86330, 88658, 162692, 172660, 177316, 203365, 221645, 406730, 443290, 813460, 886580, 3945281, 7890562, 15781124, 19726405, 39452810, 78905620]

約数ペア:

[(1, 78905620), (2, 39452810), (4, 19726405), (5, 15781124), (10, 7890562), (20, 3945281), (89, 886580), (97, 813460), (178, 443290), (194, 406730), (356, 221645), (388, 203365), (445, 177316), (457, 172660), (485, 162692), (890, 88658), (914, 86330), (970, 81346), (1780, 44329), (1828, 43165), (1940, 40673), (2285, 34532), (4570, 17266), (8633, 9140)]