21730845

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2749}}^1$

素因数の和:2805

約数の個数: 32

約数和(自身を含む): 38016000

約数和(自身を除く): 16285155

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 93, 155, 255, 465, 527, 1581, 2635, 2749, 7905, 8247, 13745, 41235, 46733, 85219, 140199, 233665, 255657, 426095, 700995, 1278285, 1448723, 4346169, 7243615, 21730845]

約数ペア:

[(1, 21730845), (3, 7243615), (5, 4346169), (15, 1448723), (17, 1278285), (31, 700995), (51, 426095), (85, 255657), (93, 233665), (155, 140199), (255, 85219), (465, 46733), (527, 41235), (1581, 13745), (2635, 8247), (2749, 7905)]