7778440

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1399}}^1$

素因数の和:1549

約数の個数: 32

約数和(自身を含む): 17640000

約数和(自身を除く): 9861560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 1399, 2780, 2798, 5560, 5596, 6995, 11192, 13990, 27980, 55960, 194461, 388922, 777844, 972305, 1555688, 1944610, 3889220, 7778440]

約数ペア:

[(1, 7778440), (2, 3889220), (4, 1944610), (5, 1555688), (8, 972305), (10, 777844), (20, 388922), (40, 194461), (139, 55960), (278, 27980), (556, 13990), (695, 11192), (1112, 6995), (1390, 5596), (1399, 5560), (2780, 2798)]