19907931

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{271}}^1\times {\mathrm{521}}^1$

素因数の和:842

約数の個数: 16

約数和(自身を含む): 27260928

約数和(自身を除く): 7352997

約数列:

[1, 3, 47, 141, 271, 521, 813, 1563, 12737, 24487, 38211, 73461, 141191, 423573, 6635977, 19907931]

約数ペア:

[(1, 19907931), (3, 6635977), (47, 423573), (141, 141191), (271, 73461), (521, 38211), (813, 24487), (1563, 12737)]