1978340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1087}}^1$

素因数の和:1116

約数の個数: 48

約数和(自身を含む): 5117952

約数和(自身を除く): 3139612

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1087, 1820, 2174, 4348, 5435, 7609, 10870, 14131, 15218, 21740, 28262, 30436, 38045, 56524, 70655, 76090, 98917, 141310, 152180, 197834, 282620, 395668, 494585, 989170, 1978340]

約数ペア:

[(1, 1978340), (2, 989170), (4, 494585), (5, 395668), (7, 282620), (10, 197834), (13, 152180), (14, 141310), (20, 98917), (26, 76090), (28, 70655), (35, 56524), (52, 38045), (65, 30436), (70, 28262), (91, 21740), (130, 15218), (140, 14131), (182, 10870), (260, 7609), (364, 5435), (455, 4348), (910, 2174), (1087, 1820)]