20313440

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2591}}^1$

素因数の和:2620

約数の個数: 72

約数和(自身を含む): 55847232

約数和(自身を除く): 35533792

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2591, 3920, 5182, 7840, 10364, 12955, 18137, 20728, 25910, 36274, 41456, 51820, 72548, 82912, 90685, 103640, 126959, 145096, 181370, 207280, 253918, 290192, 362740, 414560, 507836, 580384, 634795, 725480, 1015672, 1269590, 1450960, 2031344, 2539180, 2901920, 4062688, 5078360, 10156720, 20313440]

約数ペア:

[(1, 20313440), (2, 10156720), (4, 5078360), (5, 4062688), (7, 2901920), (8, 2539180), (10, 2031344), (14, 1450960), (16, 1269590), (20, 1015672), (28, 725480), (32, 634795), (35, 580384), (40, 507836), (49, 414560), (56, 362740), (70, 290192), (80, 253918), (98, 207280), (112, 181370), (140, 145096), (160, 126959), (196, 103640), (224, 90685), (245, 82912), (280, 72548), (392, 51820), (490, 41456), (560, 36274), (784, 25910), (980, 20728), (1120, 18137), (1568, 12955), (1960, 10364), (2591, 7840), (3920, 5182)]