31421720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71413}}^1$

素因数の和:71435

約数の個数: 32

約数和(自身を含む): 77127120

約数和(自身を除く): 45705400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 71413, 142826, 285652, 357065, 571304, 714130, 785543, 1428260, 1571086, 2856520, 3142172, 3927715, 6284344, 7855430, 15710860, 31421720]

約数ペア:

[(1, 31421720), (2, 15710860), (4, 7855430), (5, 6284344), (8, 3927715), (10, 3142172), (11, 2856520), (20, 1571086), (22, 1428260), (40, 785543), (44, 714130), (55, 571304), (88, 357065), (110, 285652), (220, 142826), (440, 71413)]