21005210

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{271}}^1\times {\mathrm{337}}^1$

素因数の和:638

約数の個数: 32

約数和(自身を含む): 39716352

約数和(自身を除く): 18711142

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 271, 337, 542, 674, 1355, 1685, 2710, 3370, 6233, 7751, 12466, 15502, 31165, 38755, 62330, 77510, 91327, 182654, 456635, 913270, 2100521, 4201042, 10502605, 21005210]

約数ペア:

[(1, 21005210), (2, 10502605), (5, 4201042), (10, 2100521), (23, 913270), (46, 456635), (115, 182654), (230, 91327), (271, 77510), (337, 62330), (542, 38755), (674, 31165), (1355, 15502), (1685, 12466), (2710, 7751), (3370, 6233)]