20282990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{719}}^1$

素因数の和:777

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 26165650

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 31, 35, 62, 65, 70, 91, 130, 155, 182, 217, 310, 403, 434, 455, 719, 806, 910, 1085, 1438, 2015, 2170, 2821, 3595, 4030, 5033, 5642, 7190, 9347, 10066, 14105, 18694, 22289, 25165, 28210, 44578, 46735, 50330, 65429, 93470, 111445, 130858, 156023, 222890, 289757, 312046, 327145, 579514, 654290, 780115, 1448785, 1560230, 2028299, 2897570, 4056598, 10141495, 20282990]

約数ペア:

[(1, 20282990), (2, 10141495), (5, 4056598), (7, 2897570), (10, 2028299), (13, 1560230), (14, 1448785), (26, 780115), (31, 654290), (35, 579514), (62, 327145), (65, 312046), (70, 289757), (91, 222890), (130, 156023), (155, 130858), (182, 111445), (217, 93470), (310, 65429), (403, 50330), (434, 46735), (455, 44578), (719, 28210), (806, 25165), (910, 22289), (1085, 18694), (1438, 14105), (2015, 10066), (2170, 9347), (2821, 7190), (3595, 5642), (4030, 5033)]