138821720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{111953}}^1$

素因数の和:111995

約数の個数: 32

約数和(自身を含む): 322427520

約数和(自身を除く): 183605800

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 111953, 223906, 447812, 559765, 895624, 1119530, 2239060, 3470543, 4478120, 6941086, 13882172, 17352715, 27764344, 34705430, 69410860, 138821720]

約数ペア:

[(1, 138821720), (2, 69410860), (4, 34705430), (5, 27764344), (8, 17352715), (10, 13882172), (20, 6941086), (31, 4478120), (40, 3470543), (62, 2239060), (124, 1119530), (155, 895624), (248, 559765), (310, 447812), (620, 223906), (1240, 111953)]