20921810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{277}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 47077632

約数和(自身を除く): 26155822

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 83, 91, 130, 166, 182, 277, 415, 455, 554, 581, 830, 910, 1079, 1162, 1385, 1939, 2158, 2770, 2905, 3601, 3878, 5395, 5810, 7202, 7553, 9695, 10790, 15106, 18005, 19390, 22991, 25207, 36010, 37765, 45982, 50414, 75530, 114955, 126035, 160937, 229910, 252070, 298883, 321874, 597766, 804685, 1494415, 1609370, 2092181, 2988830, 4184362, 10460905, 20921810]

約数ペア:

[(1, 20921810), (2, 10460905), (5, 4184362), (7, 2988830), (10, 2092181), (13, 1609370), (14, 1494415), (26, 804685), (35, 597766), (65, 321874), (70, 298883), (83, 252070), (91, 229910), (130, 160937), (166, 126035), (182, 114955), (277, 75530), (415, 50414), (455, 45982), (554, 37765), (581, 36010), (830, 25207), (910, 22991), (1079, 19390), (1162, 18005), (1385, 15106), (1939, 10790), (2158, 9695), (2770, 7553), (2905, 7202), (3601, 5810), (3878, 5395)]