21504280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76801}}^1$

素因数の和:76819

約数の個数: 32

約数和(自身を含む): 55297440

約数和(自身を除く): 33793160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76801, 153602, 307204, 384005, 537607, 614408, 768010, 1075214, 1536020, 2150428, 2688035, 3072040, 4300856, 5376070, 10752140, 21504280]

約数ペア:

[(1, 21504280), (2, 10752140), (4, 5376070), (5, 4300856), (7, 3072040), (8, 2688035), (10, 2150428), (14, 1536020), (20, 1075214), (28, 768010), (35, 614408), (40, 537607), (56, 384005), (70, 307204), (140, 153602), (280, 76801)]