20955915

素因数分解:

$3^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{877}}^1$

素因数の和:953

約数の個数: 40

約数和(自身を含む): 38245680

約数和(自身を除く): 17289765

約数列:

[1, 3, 5, 9, 15, 27, 45, 59, 81, 135, 177, 295, 405, 531, 877, 885, 1593, 2631, 2655, 4385, 4779, 7893, 7965, 13155, 23679, 23895, 39465, 51743, 71037, 118395, 155229, 258715, 355185, 465687, 776145, 1397061, 2328435, 4191183, 6985305, 20955915]

約数ペア:

[(1, 20955915), (3, 6985305), (5, 4191183), (9, 2328435), (15, 1397061), (27, 776145), (45, 465687), (59, 355185), (81, 258715), (135, 155229), (177, 118395), (295, 71037), (405, 51743), (531, 39465), (877, 23895), (885, 23679), (1593, 13155), (2631, 7965), (2655, 7893), (4385, 4779)]