21228070

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{647}}^1$

素因数の和:864

約数の個数: 32

約数和(自身を含む): 40730688

約数和(自身を除く): 19502618

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 193, 386, 647, 965, 1294, 1930, 3235, 3281, 6470, 6562, 10999, 16405, 21998, 32810, 54995, 109990, 124871, 249742, 624355, 1248710, 2122807, 4245614, 10614035, 21228070]

約数ペア:

[(1, 21228070), (2, 10614035), (5, 4245614), (10, 2122807), (17, 1248710), (34, 624355), (85, 249742), (170, 124871), (193, 109990), (386, 54995), (647, 32810), (965, 21998), (1294, 16405), (1930, 10999), (3235, 6562), (3281, 6470)]