21035205

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{887}}^1$

素因数の和:946

約数の個数: 48

約数和(自身を含む): 39896064

約数和(自身を除く): 18860859

約数列:

[1, 3, 5, 9, 15, 17, 31, 45, 51, 85, 93, 153, 155, 255, 279, 465, 527, 765, 887, 1395, 1581, 2635, 2661, 4435, 4743, 7905, 7983, 13305, 15079, 23715, 27497, 39915, 45237, 75395, 82491, 135711, 137485, 226185, 247473, 412455, 467449, 678555, 1237365, 1402347, 2337245, 4207041, 7011735, 21035205]

約数ペア:

[(1, 21035205), (3, 7011735), (5, 4207041), (9, 2337245), (15, 1402347), (17, 1237365), (31, 678555), (45, 467449), (51, 412455), (85, 247473), (93, 226185), (153, 137485), (155, 135711), (255, 82491), (279, 75395), (465, 45237), (527, 39915), (765, 27497), (887, 23715), (1395, 15079), (1581, 13305), (2635, 7983), (2661, 7905), (4435, 4743)]