18717885

素因数分解:

$3^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{409}}^1$

素因数の和:539

約数の個数: 40

約数和(自身を含む): 33933240

約数和(自身を除く): 15215355

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 113, 135, 339, 405, 409, 565, 1017, 1227, 1695, 2045, 3051, 3681, 5085, 6135, 9153, 11043, 15255, 18405, 33129, 45765, 46217, 55215, 138651, 165645, 231085, 415953, 693255, 1247859, 2079765, 3743577, 6239295, 18717885]

約数ペア:

[(1, 18717885), (3, 6239295), (5, 3743577), (9, 2079765), (15, 1247859), (27, 693255), (45, 415953), (81, 231085), (113, 165645), (135, 138651), (339, 55215), (405, 46217), (409, 45765), (565, 33129), (1017, 18405), (1227, 15255), (1695, 11043), (2045, 9153), (3051, 6135), (3681, 5085)]