21813805

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1039}}^1$

素因数の和:1093

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 9635795

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 1039, 1105, 1235, 1615, 4199, 5195, 13507, 17663, 19741, 20995, 67535, 88315, 98705, 229619, 256633, 335597, 1148095, 1283165, 1677985, 4362761, 21813805]

約数ペア:

[(1, 21813805), (5, 4362761), (13, 1677985), (17, 1283165), (19, 1148095), (65, 335597), (85, 256633), (95, 229619), (221, 98705), (247, 88315), (323, 67535), (1039, 20995), (1105, 19741), (1235, 17663), (1615, 13507), (4199, 5195)]