20405601

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13259}}^1$

素因数の和:13290

約数の個数: 20

約数和(自身を含む): 32089200

約数和(自身を除く): 11683599

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13259, 39777, 119331, 251921, 357993, 755763, 1073979, 2267289, 6801867, 20405601]

約数ペア:

[(1, 20405601), (3, 6801867), (9, 2267289), (19, 1073979), (27, 755763), (57, 357993), (81, 251921), (171, 119331), (513, 39777), (1539, 13259)]