21591671140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{417311}}^1$

素因数の和:417532

約数の個数: 48

約数和(自身を含む): 49075891200

約数和(自身を除く): 27484220060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 199, 260, 398, 796, 995, 1990, 2587, 3980, 5174, 10348, 12935, 25870, 51740, 417311, 834622, 1669244, 2086555, 4173110, 5425043, 8346220, 10850086, 21700172, 27125215, 54250430, 83044889, 108500860, 166089778, 332179556, 415224445, 830448890, 1079583557, 1660897780, 2159167114, 4318334228, 5397917785, 10795835570, 21591671140]

約数ペア:

[(1, 21591671140), (2, 10795835570), (4, 5397917785), (5, 4318334228), (10, 2159167114), (13, 1660897780), (20, 1079583557), (26, 830448890), (52, 415224445), (65, 332179556), (130, 166089778), (199, 108500860), (260, 83044889), (398, 54250430), (796, 27125215), (995, 21700172), (1990, 10850086), (2587, 8346220), (3980, 5425043), (5174, 4173110), (10348, 2086555), (12935, 1669244), (25870, 834622), (51740, 417311)]