28498690

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:219

約数の個数: 64

約数和(自身を含む): 58786560

約数和(自身を除く): 30287870

約数列:

[1, 2, 5, 10, 11, 22, 41, 55, 71, 82, 89, 110, 142, 178, 205, 355, 410, 445, 451, 710, 781, 890, 902, 979, 1562, 1958, 2255, 2911, 3649, 3905, 4510, 4895, 5822, 6319, 7298, 7810, 9790, 12638, 14555, 18245, 29110, 31595, 32021, 36490, 40139, 63190, 64042, 69509, 80278, 139018, 160105, 200695, 259079, 320210, 347545, 401390, 518158, 695090, 1295395, 2590790, 2849869, 5699738, 14249345, 28498690]

約数ペア:

[(1, 28498690), (2, 14249345), (5, 5699738), (10, 2849869), (11, 2590790), (22, 1295395), (41, 695090), (55, 518158), (71, 401390), (82, 347545), (89, 320210), (110, 259079), (142, 200695), (178, 160105), (205, 139018), (355, 80278), (410, 69509), (445, 64042), (451, 63190), (710, 40139), (781, 36490), (890, 32021), (902, 31595), (979, 29110), (1562, 18245), (1958, 14555), (2255, 12638), (2911, 9790), (3649, 7810), (3905, 7298), (4510, 6319), (4895, 5822)]