21306537

素因数分解:

$3^3\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1427}}^1$

素因数の和:1522

約数の個数: 32

約数和(自身を含む): 36556800

約数和(自身を除く): 15250263

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 189, 237, 553, 711, 1427, 1659, 2133, 4281, 4977, 9989, 12843, 14931, 29967, 38529, 89901, 112733, 269703, 338199, 789131, 1014597, 2367393, 3043791, 7102179, 21306537]

約数ペア:

[(1, 21306537), (3, 7102179), (7, 3043791), (9, 2367393), (21, 1014597), (27, 789131), (63, 338199), (79, 269703), (189, 112733), (237, 89901), (553, 38529), (711, 29967), (1427, 14931), (1659, 12843), (2133, 9989), (4281, 4977)]