81581720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{2347}}^1$

素因数の和:2448

約数の個数: 64

約数和(自身を含む): 202867200

約数和(自身を除く): 121285480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 632, 790, 869, 1580, 1738, 2347, 3160, 3476, 4345, 4694, 6952, 8690, 9388, 11735, 17380, 18776, 23470, 25817, 34760, 46940, 51634, 93880, 103268, 129085, 185413, 206536, 258170, 370826, 516340, 741652, 927065, 1032680, 1483304, 1854130, 2039543, 3708260, 4079086, 7416520, 8158172, 10197715, 16316344, 20395430, 40790860, 81581720]

約数ペア:

[(1, 81581720), (2, 40790860), (4, 20395430), (5, 16316344), (8, 10197715), (10, 8158172), (11, 7416520), (20, 4079086), (22, 3708260), (40, 2039543), (44, 1854130), (55, 1483304), (79, 1032680), (88, 927065), (110, 741652), (158, 516340), (220, 370826), (316, 258170), (395, 206536), (440, 185413), (632, 129085), (790, 103268), (869, 93880), (1580, 51634), (1738, 46940), (2347, 34760), (3160, 25817), (3476, 23470), (4345, 18776), (4694, 17380), (6952, 11735), (8690, 9388)]