81967760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{743}}^1$

素因数の和:960

約数の個数: 80

約数和(自身を含む): 219200256

約数和(自身を除く): 137232496

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 197, 280, 394, 560, 743, 788, 985, 1379, 1486, 1576, 1970, 2758, 2972, 3152, 3715, 3940, 5201, 5516, 5944, 6895, 7430, 7880, 10402, 11032, 11888, 13790, 14860, 15760, 20804, 22064, 26005, 27580, 29720, 41608, 52010, 55160, 59440, 83216, 104020, 110320, 146371, 208040, 292742, 416080, 585484, 731855, 1024597, 1170968, 1463710, 2049194, 2341936, 2927420, 4098388, 5122985, 5854840, 8196776, 10245970, 11709680, 16393552, 20491940, 40983880, 81967760]

約数ペア:

[(1, 81967760), (2, 40983880), (4, 20491940), (5, 16393552), (7, 11709680), (8, 10245970), (10, 8196776), (14, 5854840), (16, 5122985), (20, 4098388), (28, 2927420), (35, 2341936), (40, 2049194), (56, 1463710), (70, 1170968), (80, 1024597), (112, 731855), (140, 585484), (197, 416080), (280, 292742), (394, 208040), (560, 146371), (743, 110320), (788, 104020), (985, 83216), (1379, 59440), (1486, 55160), (1576, 52010), (1970, 41608), (2758, 29720), (2972, 27580), (3152, 26005), (3715, 22064), (3940, 20804), (5201, 15760), (5516, 14860), (5944, 13790), (6895, 11888), (7430, 11032), (7880, 10402)]