21198612080

素因数分解:

$2^4\times 5^1\times {\mathrm{1069}}^1\times {\mathrm{247879}}^1$

素因数の和:248961

約数の個数: 40

約数和(自身を含む): 49333077600

約数和(自身を除く): 28134465520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1069, 2138, 4276, 5345, 8552, 10690, 17104, 21380, 42760, 85520, 247879, 495758, 991516, 1239395, 1983032, 2478790, 3966064, 4957580, 9915160, 19830320, 264982651, 529965302, 1059930604, 1324913255, 2119861208, 2649826510, 4239722416, 5299653020, 10599306040, 21198612080]

約数ペア:

[(1, 21198612080), (2, 10599306040), (4, 5299653020), (5, 4239722416), (8, 2649826510), (10, 2119861208), (16, 1324913255), (20, 1059930604), (40, 529965302), (80, 264982651), (1069, 19830320), (2138, 9915160), (4276, 4957580), (5345, 3966064), (8552, 2478790), (10690, 1983032), (17104, 1239395), (21380, 991516), (42760, 495758), (85520, 247879)]