81234580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{1447}}^1$

素因数の和:1864

約数の個数: 48

約数和(自身を含む): 195584256

約数和(自身を除く): 114349676

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 401, 802, 1447, 1604, 2005, 2807, 2894, 4010, 5614, 5788, 7235, 8020, 10129, 11228, 14035, 14470, 20258, 28070, 28940, 40516, 50645, 56140, 101290, 202580, 580247, 1160494, 2320988, 2901235, 4061729, 5802470, 8123458, 11604940, 16246916, 20308645, 40617290, 81234580]

約数ペア:

[(1, 81234580), (2, 40617290), (4, 20308645), (5, 16246916), (7, 11604940), (10, 8123458), (14, 5802470), (20, 4061729), (28, 2901235), (35, 2320988), (70, 1160494), (140, 580247), (401, 202580), (802, 101290), (1447, 56140), (1604, 50645), (2005, 40516), (2807, 28940), (2894, 28070), (4010, 20258), (5614, 14470), (5788, 14035), (7235, 11228), (8020, 10129)]