21001370

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{2213}}^1$

素因数の和:2306

約数の個数: 32

約数和(自身を含む): 41286672

約数和(自身を除く): 20285302

約数列:

[1, 2, 5, 10, 13, 26, 65, 73, 130, 146, 365, 730, 949, 1898, 2213, 4426, 4745, 9490, 11065, 22130, 28769, 57538, 143845, 161549, 287690, 323098, 807745, 1615490, 2100137, 4200274, 10500685, 21001370]

約数ペア:

[(1, 21001370), (2, 10500685), (5, 4200274), (10, 2100137), (13, 1615490), (26, 807745), (65, 323098), (73, 287690), (130, 161549), (146, 143845), (365, 57538), (730, 28769), (949, 22130), (1898, 11065), (2213, 9490), (4426, 4745)]