21001959520

素因数分解:

$2^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{359}}^1\times {\mathrm{2879}}^1$

素因数の和:3380

約数の個数: 96

約数和(自身を含む): 50164531200

約数和(自身を除く): 29162571680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 359, 508, 635, 718, 1016, 1270, 1436, 1795, 2032, 2540, 2872, 2879, 3590, 4064, 5080, 5744, 5758, 7180, 10160, 11488, 11516, 14360, 14395, 20320, 23032, 28720, 28790, 45593, 46064, 57440, 57580, 91186, 92128, 115160, 182372, 227965, 230320, 364744, 365633, 455930, 460640, 729488, 731266, 911860, 1033561, 1458976, 1462532, 1823720, 1828165, 2067122, 2925064, 3647440, 3656330, 4134244, 5167805, 5850128, 7294880, 7312660, 8268488, 10335610, 11700256, 14625320, 16536976, 20671220, 29250640, 33073952, 41342440, 58501280, 82684880, 131262247, 165369760, 262524494, 525048988, 656311235, 1050097976, 1312622470, 2100195952, 2625244940, 4200391904, 5250489880, 10500979760, 21001959520]

約数ペア:

[(1, 21001959520), (2, 10500979760), (4, 5250489880), (5, 4200391904), (8, 2625244940), (10, 2100195952), (16, 1312622470), (20, 1050097976), (32, 656311235), (40, 525048988), (80, 262524494), (127, 165369760), (160, 131262247), (254, 82684880), (359, 58501280), (508, 41342440), (635, 33073952), (718, 29250640), (1016, 20671220), (1270, 16536976), (1436, 14625320), (1795, 11700256), (2032, 10335610), (2540, 8268488), (2872, 7312660), (2879, 7294880), (3590, 5850128), (4064, 5167805), (5080, 4134244), (5744, 3656330), (5758, 3647440), (7180, 2925064), (10160, 2067122), (11488, 1828165), (11516, 1823720), (14360, 1462532), (14395, 1458976), (20320, 1033561), (23032, 911860), (28720, 731266), (28790, 729488), (45593, 460640), (46064, 455930), (57440, 365633), (57580, 364744), (91186, 230320), (92128, 227965), (115160, 182372)]