21167480

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12907}}^1$

素因数の和:12959

約数の個数: 32

約数和(自身を含む): 48792240

約数和(自身を除く): 27624760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12907, 25814, 51628, 64535, 103256, 129070, 258140, 516280, 529187, 1058374, 2116748, 2645935, 4233496, 5291870, 10583740, 21167480]

約数ペア:

[(1, 21167480), (2, 10583740), (4, 5291870), (5, 4233496), (8, 2645935), (10, 2116748), (20, 1058374), (40, 529187), (41, 516280), (82, 258140), (164, 129070), (205, 103256), (328, 64535), (410, 51628), (820, 25814), (1640, 12907)]