21246820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3229}}^1$

素因数の和:3292

約数の個数: 48

約数和(自身を含む): 52093440

約数和(自身を除く): 30846620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3229, 3290, 6458, 6580, 12916, 16145, 22603, 32290, 45206, 64580, 90412, 113015, 151763, 226030, 303526, 452060, 607052, 758815, 1062341, 1517630, 2124682, 3035260, 4249364, 5311705, 10623410, 21246820]

約数ペア:

[(1, 21246820), (2, 10623410), (4, 5311705), (5, 4249364), (7, 3035260), (10, 2124682), (14, 1517630), (20, 1062341), (28, 758815), (35, 607052), (47, 452060), (70, 303526), (94, 226030), (140, 151763), (188, 113015), (235, 90412), (329, 64580), (470, 45206), (658, 32290), (940, 22603), (1316, 16145), (1645, 12916), (3229, 6580), (3290, 6458)]