81478705

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{211}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 131880960

約数和(自身を除く): 50402255

約数列:

[1, 5, 7, 11, 17, 35, 55, 59, 77, 85, 119, 187, 211, 295, 385, 413, 595, 649, 935, 1003, 1055, 1309, 1477, 2065, 2321, 3245, 3587, 4543, 5015, 6545, 7021, 7385, 11033, 11605, 12449, 16247, 17935, 22715, 25109, 35105, 39457, 55165, 62245, 77231, 81235, 87143, 125545, 136939, 197285, 211633, 276199, 386155, 435715, 684695, 958573, 1058165, 1380995, 1481431, 2327963, 4792865, 7407155, 11639815, 16295741, 81478705]

約数ペア:

[(1, 81478705), (5, 16295741), (7, 11639815), (11, 7407155), (17, 4792865), (35, 2327963), (55, 1481431), (59, 1380995), (77, 1058165), (85, 958573), (119, 684695), (187, 435715), (211, 386155), (295, 276199), (385, 211633), (413, 197285), (595, 136939), (649, 125545), (935, 87143), (1003, 81235), (1055, 77231), (1309, 62245), (1477, 55165), (2065, 39457), (2321, 35105), (3245, 25109), (3587, 22715), (4543, 17935), (5015, 16247), (6545, 12449), (7021, 11605), (7385, 11033)]