21315530

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{2609}}^1$

素因数の和:2678

約数の個数: 32

約数和(自身を含む): 41342400

約数和(自身を除く): 20026870

約数列:

[1, 2, 5, 10, 19, 38, 43, 86, 95, 190, 215, 430, 817, 1634, 2609, 4085, 5218, 8170, 13045, 26090, 49571, 99142, 112187, 224374, 247855, 495710, 560935, 1121870, 2131553, 4263106, 10657765, 21315530]

約数ペア:

[(1, 21315530), (2, 10657765), (5, 4263106), (10, 2131553), (19, 1121870), (38, 560935), (43, 495710), (86, 247855), (95, 224374), (190, 112187), (215, 99142), (430, 49571), (817, 26090), (1634, 13045), (2609, 8170), (4085, 5218)]