21340179

素因数分解:

$3^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{617}}^1$

素因数の和:697

約数の個数: 40

約数和(自身を含む): 37089888

約数和(自身を除く): 15749709

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 81, 183, 189, 427, 549, 567, 617, 1281, 1647, 1851, 3843, 4319, 4941, 5553, 11529, 12957, 16659, 34587, 37637, 38871, 49977, 112911, 116613, 263459, 338733, 349839, 790377, 1016199, 2371131, 3048597, 7113393, 21340179]

約数ペア:

[(1, 21340179), (3, 7113393), (7, 3048597), (9, 2371131), (21, 1016199), (27, 790377), (61, 349839), (63, 338733), (81, 263459), (183, 116613), (189, 112911), (427, 49977), (549, 38871), (567, 37637), (617, 34587), (1281, 16659), (1647, 12957), (1851, 11529), (3843, 5553), (4319, 4941)]