21238216

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{577}}^1$

素因数の和:733

約数の個数: 32

約数和(自身を含む): 41199840

約数和(自身を除く): 19961624

約数列:

[1, 2, 4, 8, 43, 86, 107, 172, 214, 344, 428, 577, 856, 1154, 2308, 4601, 4616, 9202, 18404, 24811, 36808, 49622, 61739, 99244, 123478, 198488, 246956, 493912, 2654777, 5309554, 10619108, 21238216]

約数ペア:

[(1, 21238216), (2, 10619108), (4, 5309554), (8, 2654777), (43, 493912), (86, 246956), (107, 198488), (172, 123478), (214, 99244), (344, 61739), (428, 49622), (577, 36808), (856, 24811), (1154, 18404), (2308, 9202), (4601, 4616)]