21299390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2221}}^1$

素因数の和:2372

約数の個数: 32

約数和(自身を含む): 44155584

約数和(自身を除く): 22856194

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 137, 274, 685, 959, 1370, 1918, 2221, 4442, 4795, 9590, 11105, 15547, 22210, 31094, 77735, 155470, 304277, 608554, 1521385, 2129939, 3042770, 4259878, 10649695, 21299390]

約数ペア:

[(1, 21299390), (2, 10649695), (5, 4259878), (7, 3042770), (10, 2129939), (14, 1521385), (35, 608554), (70, 304277), (137, 155470), (274, 77735), (685, 31094), (959, 22210), (1370, 15547), (1918, 11105), (2221, 9590), (4442, 4795)]