21798910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{2857}}^1$

素因数の和:2980

約数の個数: 32

約数和(自身を含む): 45270720

約数和(自身を除く): 23471810

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 109, 218, 545, 763, 1090, 1526, 2857, 3815, 5714, 7630, 14285, 19999, 28570, 39998, 99995, 199990, 311413, 622826, 1557065, 2179891, 3114130, 4359782, 10899455, 21798910]

約数ペア:

[(1, 21798910), (2, 10899455), (5, 4359782), (7, 3114130), (10, 2179891), (14, 1557065), (35, 622826), (70, 311413), (109, 199990), (218, 99995), (545, 39998), (763, 28570), (1090, 19999), (1526, 14285), (2857, 7630), (3815, 5714)]