20619921

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{51679}}^1$

素因数の和:51708

約数の個数: 16

約数和(自身を含む): 33075200

約数和(自身を除く): 12455279

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 51679, 155037, 361753, 981901, 1085259, 2945703, 6873307, 20619921]

約数ペア:

[(1, 20619921), (3, 6873307), (7, 2945703), (19, 1085259), (21, 981901), (57, 361753), (133, 155037), (399, 51679)]