21889959

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{443}}^1$

素因数の和:647

約数の個数: 32

約数和(自身を含む): 36201984

約数和(自身を除く): 14312025

約数列:

[1, 3, 7, 13, 21, 39, 91, 181, 273, 443, 543, 1267, 1329, 2353, 3101, 3801, 5759, 7059, 9303, 16471, 17277, 40313, 49413, 80183, 120939, 240549, 561281, 1042379, 1683843, 3127137, 7296653, 21889959]

約数ペア:

[(1, 21889959), (3, 7296653), (7, 3127137), (13, 1683843), (21, 1042379), (39, 561281), (91, 240549), (181, 120939), (273, 80183), (443, 49413), (543, 40313), (1267, 17277), (1329, 16471), (2353, 9303), (3101, 7059), (3801, 5759)]