81504040

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 187790400

約数和(自身を除く): 106286360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 137, 139, 214, 274, 278, 428, 535, 548, 556, 685, 695, 856, 1070, 1096, 1112, 1370, 1390, 2140, 2740, 2780, 4280, 5480, 5560, 14659, 14873, 19043, 29318, 29746, 38086, 58636, 59492, 73295, 74365, 76172, 95215, 117272, 118984, 146590, 148730, 152344, 190430, 293180, 297460, 380860, 586360, 594920, 761720, 2037601, 4075202, 8150404, 10188005, 16300808, 20376010, 40752020, 81504040]

約数ペア:

[(1, 81504040), (2, 40752020), (4, 20376010), (5, 16300808), (8, 10188005), (10, 8150404), (20, 4075202), (40, 2037601), (107, 761720), (137, 594920), (139, 586360), (214, 380860), (274, 297460), (278, 293180), (428, 190430), (535, 152344), (548, 148730), (556, 146590), (685, 118984), (695, 117272), (856, 95215), (1070, 76172), (1096, 74365), (1112, 73295), (1370, 59492), (1390, 58636), (2140, 38086), (2740, 29746), (2780, 29318), (4280, 19043), (5480, 14873), (5560, 14659)]