20644509

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{271}}^1\times {\mathrm{379}}^1$

素因数の和:720

約数の個数: 16

約数和(自身を含む): 28113920

約数和(自身を除く): 7469411

約数列:

[1, 3, 67, 201, 271, 379, 813, 1137, 18157, 25393, 54471, 76179, 102709, 308127, 6881503, 20644509]

約数ペア:

[(1, 20644509), (3, 6881503), (67, 308127), (201, 102709), (271, 76179), (379, 54471), (813, 25393), (1137, 18157)]