80989220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{3943}}^1$

素因数の和:4044

約数の個数: 48

約数和(自身を含む): 185525760

約数和(自身を除く): 104536540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1580, 2054, 3943, 4108, 5135, 7886, 10270, 15772, 19715, 20540, 39430, 51259, 78860, 102518, 205036, 256295, 311497, 512590, 622994, 1025180, 1245988, 1557485, 3114970, 4049461, 6229940, 8098922, 16197844, 20247305, 40494610, 80989220]

約数ペア:

[(1, 80989220), (2, 40494610), (4, 20247305), (5, 16197844), (10, 8098922), (13, 6229940), (20, 4049461), (26, 3114970), (52, 1557485), (65, 1245988), (79, 1025180), (130, 622994), (158, 512590), (260, 311497), (316, 256295), (395, 205036), (790, 102518), (1027, 78860), (1580, 51259), (2054, 39430), (3943, 20540), (4108, 19715), (5135, 15772), (7886, 10270)]