261650240

素因数分解:

$2^6\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1237}}^1$

素因数の和:1915

約数の個数: 56

約数和(自身を含む): 624501672

約数和(自身を除く): 362851432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 661, 1237, 1322, 2474, 2644, 3305, 4948, 5288, 6185, 6610, 9896, 10576, 12370, 13220, 19792, 21152, 24740, 26440, 39584, 42304, 49480, 52880, 79168, 98960, 105760, 197920, 211520, 395840, 817657, 1635314, 3270628, 4088285, 6541256, 8176570, 13082512, 16353140, 26165024, 32706280, 52330048, 65412560, 130825120, 261650240]

約数ペア:

[(1, 261650240), (2, 130825120), (4, 65412560), (5, 52330048), (8, 32706280), (10, 26165024), (16, 16353140), (20, 13082512), (32, 8176570), (40, 6541256), (64, 4088285), (80, 3270628), (160, 1635314), (320, 817657), (661, 395840), (1237, 211520), (1322, 197920), (2474, 105760), (2644, 98960), (3305, 79168), (4948, 52880), (5288, 49480), (6185, 42304), (6610, 39584), (9896, 26440), (10576, 24740), (12370, 21152), (13220, 19792)]