21509793

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{9157}}^1$

素因数の和:9198

約数の個数: 20

約数和(自身を含む): 33243540

約数和(自身を除く): 11733747

約数列:

[1, 3, 9, 27, 29, 81, 87, 261, 783, 2349, 9157, 27471, 82413, 247239, 265553, 741717, 796659, 2389977, 7169931, 21509793]

約数ペア:

[(1, 21509793), (3, 7169931), (9, 2389977), (27, 796659), (29, 741717), (81, 265553), (87, 247239), (261, 82413), (783, 27471), (2349, 9157)]