21121659

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{167}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 35223552

約数和(自身を除く): 14101893

約数列:

[1, 3, 9, 13, 23, 39, 47, 69, 117, 141, 167, 207, 299, 423, 501, 611, 897, 1081, 1503, 1833, 2171, 2691, 3243, 3841, 5499, 6513, 7849, 9729, 11523, 14053, 19539, 23547, 34569, 42159, 49933, 70641, 102037, 126477, 149799, 180527, 306111, 449397, 541581, 918333, 1624743, 2346851, 7040553, 21121659]

約数ペア:

[(1, 21121659), (3, 7040553), (9, 2346851), (13, 1624743), (23, 918333), (39, 541581), (47, 449397), (69, 306111), (117, 180527), (141, 149799), (167, 126477), (207, 102037), (299, 70641), (423, 49933), (501, 42159), (611, 34569), (897, 23547), (1081, 19539), (1503, 14053), (1833, 11523), (2171, 9729), (2691, 7849), (3243, 6513), (3841, 5499)]