21872680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13337}}^1$

素因数の和:13389

約数の個数: 32

約数和(自身を含む): 50417640

約数和(自身を除く): 28544960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13337, 26674, 53348, 66685, 106696, 133370, 266740, 533480, 546817, 1093634, 2187268, 2734085, 4374536, 5468170, 10936340, 21872680]

約数ペア:

[(1, 21872680), (2, 10936340), (4, 5468170), (5, 4374536), (8, 2734085), (10, 2187268), (20, 1093634), (40, 546817), (41, 533480), (82, 266740), (164, 133370), (205, 106696), (328, 66685), (410, 53348), (820, 26674), (1640, 13337)]