21685904

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:407

約数の個数: 40

約数和(自身を含む): 43390080

約数和(自身を除く): 21704176

約数列:

[1, 2, 4, 8, 16, 53, 106, 107, 212, 214, 239, 424, 428, 478, 848, 856, 956, 1712, 1912, 3824, 5671, 11342, 12667, 22684, 25334, 25573, 45368, 50668, 51146, 90736, 101336, 102292, 202672, 204584, 409168, 1355369, 2710738, 5421476, 10842952, 21685904]

約数ペア:

[(1, 21685904), (2, 10842952), (4, 5421476), (8, 2710738), (16, 1355369), (53, 409168), (106, 204584), (107, 202672), (212, 102292), (214, 101336), (239, 90736), (424, 51146), (428, 50668), (478, 45368), (848, 25573), (856, 25334), (956, 22684), (1712, 12667), (1912, 11342), (3824, 5671)]