12981280

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^2$

素因数の和:186

約数の個数: 72

約数和(自身を含む): 33450732

約数和(自身を除く): 20469452

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 79, 80, 104, 130, 158, 160, 208, 260, 316, 395, 416, 520, 632, 790, 1027, 1040, 1264, 1580, 2054, 2080, 2528, 3160, 4108, 5135, 6241, 6320, 8216, 10270, 12482, 12640, 16432, 20540, 24964, 31205, 32864, 41080, 49928, 62410, 81133, 82160, 99856, 124820, 162266, 164320, 199712, 249640, 324532, 405665, 499280, 649064, 811330, 998560, 1298128, 1622660, 2596256, 3245320, 6490640, 12981280]

約数ペア:

[(1, 12981280), (2, 6490640), (4, 3245320), (5, 2596256), (8, 1622660), (10, 1298128), (13, 998560), (16, 811330), (20, 649064), (26, 499280), (32, 405665), (40, 324532), (52, 249640), (65, 199712), (79, 164320), (80, 162266), (104, 124820), (130, 99856), (158, 82160), (160, 81133), (208, 62410), (260, 49928), (316, 41080), (395, 32864), (416, 31205), (520, 24964), (632, 20540), (790, 16432), (1027, 12640), (1040, 12482), (1264, 10270), (1580, 8216), (2054, 6320), (2080, 6241), (2528, 5135), (3160, 4108)]