81938440

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{3137}}^1$

素因数の和:3801

約数の個数: 32

約数和(自身を含む): 184702680

約数和(自身を除く): 102764240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 1306, 2612, 3137, 3265, 5224, 6274, 6530, 12548, 13060, 15685, 25096, 26120, 31370, 62740, 125480, 2048461, 4096922, 8193844, 10242305, 16387688, 20484610, 40969220, 81938440]

約数ペア:

[(1, 81938440), (2, 40969220), (4, 20484610), (5, 16387688), (8, 10242305), (10, 8193844), (20, 4096922), (40, 2048461), (653, 125480), (1306, 62740), (2612, 31370), (3137, 26120), (3265, 25096), (5224, 15685), (6274, 13060), (6530, 12548)]