21013047

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{509}}^1$

素因数の和:668

約数の個数: 32

約数和(自身を含む): 34272000

約数和(自身を除く): 13258953

約数列:

[1, 3, 9, 11, 27, 33, 99, 139, 297, 417, 509, 1251, 1527, 1529, 3753, 4581, 4587, 5599, 13743, 13761, 16797, 41283, 50391, 70751, 151173, 212253, 636759, 778261, 1910277, 2334783, 7004349, 21013047]

約数ペア:

[(1, 21013047), (3, 7004349), (9, 2334783), (11, 1910277), (27, 778261), (33, 636759), (99, 212253), (139, 151173), (297, 70751), (417, 50391), (509, 41283), (1251, 16797), (1527, 13761), (1529, 13743), (3753, 5599), (4581, 4587)]