19958913

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{563}}^1$

素因数の和:686

約数の個数: 32

約数和(自身を含む): 32215680

約数和(自身を除く): 12256767

約数列:

[1, 3, 9, 13, 27, 39, 101, 117, 303, 351, 563, 909, 1313, 1689, 2727, 3939, 5067, 7319, 11817, 15201, 21957, 35451, 56863, 65871, 170589, 197613, 511767, 739219, 1535301, 2217657, 6652971, 19958913]

約数ペア:

[(1, 19958913), (3, 6652971), (9, 2217657), (13, 1535301), (27, 739219), (39, 511767), (101, 197613), (117, 170589), (303, 65871), (351, 56863), (563, 35451), (909, 21957), (1313, 15201), (1689, 11817), (2727, 7319), (3939, 5067)]