21352989

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 33648640

約数和(自身を除く): 12295651

約数列:

[1, 3, 7, 21, 61, 79, 183, 211, 237, 427, 553, 633, 1281, 1477, 1659, 4431, 4819, 12871, 14457, 16669, 33733, 38613, 50007, 90097, 101199, 116683, 270291, 350049, 1016809, 3050427, 7117663, 21352989]

約数ペア:

[(1, 21352989), (3, 7117663), (7, 3050427), (21, 1016809), (61, 350049), (79, 270291), (183, 116683), (211, 101199), (237, 90097), (427, 50007), (553, 38613), (633, 33733), (1281, 16669), (1477, 14457), (1659, 12871), (4431, 4819)]