20715885

素因数分解:

$3^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{887}}^1$

素因数の和:1074

約数の個数: 32

約数和(自身を含む): 37082880

約数和(自身を除く): 16366995

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 173, 519, 865, 887, 1557, 2595, 2661, 4435, 4671, 7785, 7983, 13305, 23355, 23949, 39915, 119745, 153451, 460353, 767255, 1381059, 2301765, 4143177, 6905295, 20715885]

約数ペア:

[(1, 20715885), (3, 6905295), (5, 4143177), (9, 2301765), (15, 1381059), (27, 767255), (45, 460353), (135, 153451), (173, 119745), (519, 39915), (865, 23949), (887, 23355), (1557, 13305), (2595, 7983), (2661, 7785), (4435, 4671)]