20921784772

素因数分解:

$2^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{409}}^1\times {\mathrm{17737}}^1$

素因数の和:18260

約数の個数: 48

約数和(自身を含む): 42355505920

約数和(自身を除く): 21433721148

約数列:

[1, 2, 4, 7, 14, 28, 103, 206, 409, 412, 721, 818, 1442, 1636, 2863, 2884, 5726, 11452, 17737, 35474, 42127, 70948, 84254, 124159, 168508, 248318, 294889, 496636, 589778, 1179556, 1826911, 3653822, 7254433, 7307644, 12788377, 14508866, 25576754, 29017732, 50781031, 51153508, 101562062, 203124124, 747206599, 1494413198, 2988826396, 5230446193, 10460892386, 20921784772]

約数ペア:

[(1, 20921784772), (2, 10460892386), (4, 5230446193), (7, 2988826396), (14, 1494413198), (28, 747206599), (103, 203124124), (206, 101562062), (409, 51153508), (412, 50781031), (721, 29017732), (818, 25576754), (1442, 14508866), (1636, 12788377), (2863, 7307644), (2884, 7254433), (5726, 3653822), (11452, 1826911), (17737, 1179556), (35474, 589778), (42127, 496636), (70948, 294889), (84254, 248318), (124159, 168508)]