209890925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 289267200

約数和(自身を除く): 79376275

約数列:

[1, 5, 17, 25, 31, 85, 89, 155, 179, 425, 445, 527, 775, 895, 1513, 2225, 2635, 2759, 3043, 4475, 5549, 7565, 13175, 13795, 15215, 15931, 27745, 37825, 46903, 68975, 76075, 79655, 94333, 138725, 234515, 270827, 398275, 471665, 493861, 1172575, 1354135, 2358325, 2469305, 6770675, 8395637, 12346525, 41978185, 209890925]

約数ペア:

[(1, 209890925), (5, 41978185), (17, 12346525), (25, 8395637), (31, 6770675), (85, 2469305), (89, 2358325), (155, 1354135), (179, 1172575), (425, 493861), (445, 471665), (527, 398275), (775, 270827), (895, 234515), (1513, 138725), (2225, 94333), (2635, 79655), (2759, 76075), (3043, 68975), (4475, 46903), (5549, 37825), (7565, 27745), (13175, 15931), (13795, 15215)]