861021

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 1447680

約数和(自身を除く): 586659

約数列:

[1, 3, 7, 9, 21, 63, 79, 173, 237, 519, 553, 711, 1211, 1557, 1659, 3633, 4977, 10899, 13667, 41001, 95669, 123003, 287007, 861021]

約数ペア:

[(1, 861021), (3, 287007), (7, 123003), (9, 95669), (21, 41001), (63, 13667), (79, 10899), (173, 4977), (237, 3633), (519, 1659), (553, 1557), (711, 1211)]