21053090

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51349}}^1$

素因数の和:51397

約数の個数: 16

約数和(自身を含む): 38820600

約数和(自身を除く): 17767510

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51349, 102698, 256745, 513490, 2105309, 4210618, 10526545, 21053090]

約数ペア:

[(1, 21053090), (2, 10526545), (5, 4210618), (10, 2105309), (41, 513490), (82, 256745), (205, 102698), (410, 51349)]