20123831

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{113}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 26557440

約数和(自身を除く): 6433609

約数列:

[1, 7, 13, 19, 91, 103, 113, 133, 247, 721, 791, 1339, 1469, 1729, 1957, 2147, 9373, 10283, 11639, 13699, 15029, 25441, 27911, 81473, 151307, 178087, 195377, 221141, 1059149, 1547987, 2874833, 20123831]

約数ペア:

[(1, 20123831), (7, 2874833), (13, 1547987), (19, 1059149), (91, 221141), (103, 195377), (113, 178087), (133, 151307), (247, 81473), (721, 27911), (791, 25441), (1339, 15029), (1469, 13699), (1729, 11639), (1957, 10283), (2147, 9373)]