865840

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:229

約数の個数: 40

約数和(自身を含む): 2053440

約数和(自身を除く): 1187600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 137, 158, 274, 316, 395, 548, 632, 685, 790, 1096, 1264, 1370, 1580, 2192, 2740, 3160, 5480, 6320, 10823, 10960, 21646, 43292, 54115, 86584, 108230, 173168, 216460, 432920, 865840]

約数ペア:

[(1, 865840), (2, 432920), (4, 216460), (5, 173168), (8, 108230), (10, 86584), (16, 54115), (20, 43292), (40, 21646), (79, 10960), (80, 10823), (137, 6320), (158, 5480), (274, 3160), (316, 2740), (395, 2192), (548, 1580), (632, 1370), (685, 1264), (790, 1096)]