21720895

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 31795200

約数和(自身を除く): 10074305

約数列:

[1, 5, 7, 19, 35, 89, 95, 133, 367, 445, 623, 665, 1691, 1835, 2569, 3115, 6973, 8455, 11837, 12845, 32663, 34865, 48811, 59185, 163315, 228641, 244055, 620597, 1143205, 3102985, 4344179, 21720895]

約数ペア:

[(1, 21720895), (5, 4344179), (7, 3102985), (19, 1143205), (35, 620597), (89, 244055), (95, 228641), (133, 163315), (367, 59185), (445, 48811), (623, 34865), (665, 32663), (1691, 12845), (1835, 11837), (2569, 8455), (3115, 6973)]