21729760

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{337}}^1$

素因数の和:396

約数の個数: 96

約数和(自身を含む): 57238272

約数和(自身を除く): 35508512

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 65, 80, 104, 124, 130, 155, 160, 208, 248, 260, 310, 337, 403, 416, 496, 520, 620, 674, 806, 992, 1040, 1240, 1348, 1612, 1685, 2015, 2080, 2480, 2696, 3224, 3370, 4030, 4381, 4960, 5392, 6448, 6740, 8060, 8762, 10447, 10784, 12896, 13480, 16120, 17524, 20894, 21905, 26960, 32240, 35048, 41788, 43810, 52235, 53920, 64480, 70096, 83576, 87620, 104470, 135811, 140192, 167152, 175240, 208940, 271622, 334304, 350480, 417880, 543244, 679055, 700960, 835760, 1086488, 1358110, 1671520, 2172976, 2716220, 4345952, 5432440, 10864880, 21729760]

約数ペア:

[(1, 21729760), (2, 10864880), (4, 5432440), (5, 4345952), (8, 2716220), (10, 2172976), (13, 1671520), (16, 1358110), (20, 1086488), (26, 835760), (31, 700960), (32, 679055), (40, 543244), (52, 417880), (62, 350480), (65, 334304), (80, 271622), (104, 208940), (124, 175240), (130, 167152), (155, 140192), (160, 135811), (208, 104470), (248, 87620), (260, 83576), (310, 70096), (337, 64480), (403, 53920), (416, 52235), (496, 43810), (520, 41788), (620, 35048), (674, 32240), (806, 26960), (992, 21905), (1040, 20894), (1240, 17524), (1348, 16120), (1612, 13480), (1685, 12896), (2015, 10784), (2080, 10447), (2480, 8762), (2696, 8060), (3224, 6740), (3370, 6448), (4030, 5392), (4381, 4960)]