19989921

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41387}}^1$

素因数の和:41420

約数の個数: 16

約数和(自身を含む): 31785984

約数和(自身を除く): 11796063

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 41387, 124161, 289709, 869127, 951901, 2855703, 6663307, 19989921]

約数ペア:

[(1, 19989921), (3, 6663307), (7, 2855703), (21, 951901), (23, 869127), (69, 289709), (161, 124161), (483, 41387)]