399907760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{5623}}^1$

素因数の和:5770

約数の個数: 80

約数和(自身を含む): 1071169536

約数和(自身を除く): 671261776

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 127, 140, 254, 280, 508, 560, 635, 889, 1016, 1270, 1778, 2032, 2540, 3556, 4445, 5080, 5623, 7112, 8890, 10160, 11246, 14224, 17780, 22492, 28115, 35560, 39361, 44984, 56230, 71120, 78722, 89968, 112460, 157444, 196805, 224920, 314888, 393610, 449840, 629776, 714121, 787220, 1428242, 1574440, 2856484, 3148880, 3570605, 4998847, 5712968, 7141210, 9997694, 11425936, 14282420, 19995388, 24994235, 28564840, 39990776, 49988470, 57129680, 79981552, 99976940, 199953880, 399907760]

約数ペア:

[(1, 399907760), (2, 199953880), (4, 99976940), (5, 79981552), (7, 57129680), (8, 49988470), (10, 39990776), (14, 28564840), (16, 24994235), (20, 19995388), (28, 14282420), (35, 11425936), (40, 9997694), (56, 7141210), (70, 5712968), (80, 4998847), (112, 3570605), (127, 3148880), (140, 2856484), (254, 1574440), (280, 1428242), (508, 787220), (560, 714121), (635, 629776), (889, 449840), (1016, 393610), (1270, 314888), (1778, 224920), (2032, 196805), (2540, 157444), (3556, 112460), (4445, 89968), (5080, 78722), (5623, 71120), (7112, 56230), (8890, 44984), (10160, 39361), (11246, 35560), (14224, 28115), (17780, 22492)]