21258856

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{2131}}^1$

素因数の和:2209

約数の個数: 32

約数和(自身を含む): 42213600

約数和(自身を除く): 20954744

約数列:

[1, 2, 4, 8, 29, 43, 58, 86, 116, 172, 232, 344, 1247, 2131, 2494, 4262, 4988, 8524, 9976, 17048, 61799, 91633, 123598, 183266, 247196, 366532, 494392, 733064, 2657357, 5314714, 10629428, 21258856]

約数ペア:

[(1, 21258856), (2, 10629428), (4, 5314714), (8, 2657357), (29, 733064), (43, 494392), (58, 366532), (86, 247196), (116, 183266), (172, 123598), (232, 91633), (344, 61799), (1247, 17048), (2131, 9976), (2494, 8524), (4262, 4988)]