20912805

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27337}}^1$

素因数の和:27365

約数の個数: 24

約数和(自身を含む): 38382552

約数和(自身を除く): 17469747

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27337, 82011, 136685, 246033, 410055, 464729, 1230165, 1394187, 2323645, 4182561, 6970935, 20912805]

約数ペア:

[(1, 20912805), (3, 6970935), (5, 4182561), (9, 2323645), (15, 1394187), (17, 1230165), (45, 464729), (51, 410055), (85, 246033), (153, 136685), (255, 82011), (765, 27337)]