28204120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{263}}^1\times {\mathrm{383}}^1$

素因数の和:664

約数の個数: 64

約数和(自身を含む): 72990720

約数和(自身を除く): 44786600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 263, 280, 383, 526, 766, 1052, 1315, 1532, 1841, 1915, 2104, 2630, 2681, 3064, 3682, 3830, 5260, 5362, 7364, 7660, 9205, 10520, 10724, 13405, 14728, 15320, 18410, 21448, 26810, 36820, 53620, 73640, 100729, 107240, 201458, 402916, 503645, 705103, 805832, 1007290, 1410206, 2014580, 2820412, 3525515, 4029160, 5640824, 7051030, 14102060, 28204120]

約数ペア:

[(1, 28204120), (2, 14102060), (4, 7051030), (5, 5640824), (7, 4029160), (8, 3525515), (10, 2820412), (14, 2014580), (20, 1410206), (28, 1007290), (35, 805832), (40, 705103), (56, 503645), (70, 402916), (140, 201458), (263, 107240), (280, 100729), (383, 73640), (526, 53620), (766, 36820), (1052, 26810), (1315, 21448), (1532, 18410), (1841, 15320), (1915, 14728), (2104, 13405), (2630, 10724), (2681, 10520), (3064, 9205), (3682, 7660), (3830, 7364), (5260, 5362)]