21019395

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2659}}^1$

素因数の和:2715

約数の個数: 32

約数和(自身を含む): 36771840

約数和(自身を除く): 15752445

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 93, 155, 255, 465, 527, 1581, 2635, 2659, 7905, 7977, 13295, 39885, 45203, 82429, 135609, 226015, 247287, 412145, 678045, 1236435, 1401293, 4203879, 7006465, 21019395]

約数ペア:

[(1, 21019395), (3, 7006465), (5, 4203879), (15, 1401293), (17, 1236435), (31, 678045), (51, 412145), (85, 247287), (93, 226015), (155, 135609), (255, 82429), (465, 45203), (527, 39885), (1581, 13295), (2635, 7977), (2659, 7905)]