20979180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4019}}^1$

素因数の和:4063

約数の個数: 72

約数和(自身を含む): 65847600

約数和(自身を除く): 44868420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 4019, 5220, 8038, 12057, 16076, 20095, 24114, 36171, 40190, 48228, 60285, 72342, 80380, 116551, 120570, 144684, 180855, 233102, 241140, 349653, 361710, 466204, 582755, 699306, 723420, 1048959, 1165510, 1398612, 1748265, 2097918, 2331020, 3496530, 4195836, 5244795, 6993060, 10489590, 20979180]

約数ペア:

[(1, 20979180), (2, 10489590), (3, 6993060), (4, 5244795), (5, 4195836), (6, 3496530), (9, 2331020), (10, 2097918), (12, 1748265), (15, 1398612), (18, 1165510), (20, 1048959), (29, 723420), (30, 699306), (36, 582755), (45, 466204), (58, 361710), (60, 349653), (87, 241140), (90, 233102), (116, 180855), (145, 144684), (174, 120570), (180, 116551), (261, 80380), (290, 72342), (348, 60285), (435, 48228), (522, 40190), (580, 36171), (870, 24114), (1044, 20095), (1305, 16076), (1740, 12057), (2610, 8038), (4019, 5220)]