20603920

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:232

約数の個数: 80

約数和(自身を含む): 50621760

約数和(自身を除く): 30017840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 83, 107, 116, 145, 166, 214, 232, 290, 332, 415, 428, 464, 535, 580, 664, 830, 856, 1070, 1160, 1328, 1660, 1712, 2140, 2320, 2407, 3103, 3320, 4280, 4814, 6206, 6640, 8560, 8881, 9628, 12035, 12412, 15515, 17762, 19256, 24070, 24824, 31030, 35524, 38512, 44405, 48140, 49648, 62060, 71048, 88810, 96280, 124120, 142096, 177620, 192560, 248240, 257549, 355240, 515098, 710480, 1030196, 1287745, 2060392, 2575490, 4120784, 5150980, 10301960, 20603920]

約数ペア:

[(1, 20603920), (2, 10301960), (4, 5150980), (5, 4120784), (8, 2575490), (10, 2060392), (16, 1287745), (20, 1030196), (29, 710480), (40, 515098), (58, 355240), (80, 257549), (83, 248240), (107, 192560), (116, 177620), (145, 142096), (166, 124120), (214, 96280), (232, 88810), (290, 71048), (332, 62060), (415, 49648), (428, 48140), (464, 44405), (535, 38512), (580, 35524), (664, 31030), (830, 24824), (856, 24070), (1070, 19256), (1160, 17762), (1328, 15515), (1660, 12412), (1712, 12035), (2140, 9628), (2320, 8881), (2407, 8560), (3103, 6640), (3320, 6206), (4280, 4814)]