398412280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{719}}^1\times {\mathrm{1979}}^1$

素因数の和:2716

約数の個数: 64

約数和(自身を含む): 1026432000

約数和(自身を除く): 628019720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 719, 1438, 1979, 2876, 3595, 3958, 5033, 5752, 7190, 7916, 9895, 10066, 13853, 14380, 15832, 19790, 20132, 25165, 27706, 28760, 39580, 40264, 50330, 55412, 69265, 79160, 100660, 110824, 138530, 201320, 277060, 554120, 1422901, 2845802, 5691604, 7114505, 9960307, 11383208, 14229010, 19920614, 28458020, 39841228, 49801535, 56916040, 79682456, 99603070, 199206140, 398412280]

約数ペア:

[(1, 398412280), (2, 199206140), (4, 99603070), (5, 79682456), (7, 56916040), (8, 49801535), (10, 39841228), (14, 28458020), (20, 19920614), (28, 14229010), (35, 11383208), (40, 9960307), (56, 7114505), (70, 5691604), (140, 2845802), (280, 1422901), (719, 554120), (1438, 277060), (1979, 201320), (2876, 138530), (3595, 110824), (3958, 100660), (5033, 79160), (5752, 69265), (7190, 55412), (7916, 50330), (9895, 40264), (10066, 39580), (13853, 28760), (14380, 27706), (15832, 25165), (19790, 20132)]