19801413

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{331}}^1$

素因数の和:394

約数の個数: 36

約数和(自身を含む): 31800288

約数和(自身を除く): 11998875

約数列:

[1, 3, 9, 17, 23, 51, 69, 153, 207, 289, 331, 391, 867, 993, 1173, 2601, 2979, 3519, 5627, 6647, 7613, 16881, 19941, 22839, 50643, 59823, 68517, 95659, 129421, 286977, 388263, 860931, 1164789, 2200157, 6600471, 19801413]

約数ペア:

[(1, 19801413), (3, 6600471), (9, 2200157), (17, 1164789), (23, 860931), (51, 388263), (69, 286977), (153, 129421), (207, 95659), (289, 68517), (331, 59823), (391, 50643), (867, 22839), (993, 19941), (1173, 16881), (2601, 7613), (2979, 6647), (3519, 5627)]