21111010

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{263}}^1\times {\mathrm{349}}^1$

素因数の和:642

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18805790

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 263, 349, 526, 698, 1315, 1745, 2630, 3490, 6049, 8027, 12098, 16054, 30245, 40135, 60490, 80270, 91787, 183574, 458935, 917870, 2111101, 4222202, 10555505, 21111010]

約数ペア:

[(1, 21111010), (2, 10555505), (5, 4222202), (10, 2111101), (23, 917870), (46, 458935), (115, 183574), (230, 91787), (263, 80270), (349, 60490), (526, 40135), (698, 30245), (1315, 16054), (1745, 12098), (2630, 8027), (3490, 6049)]