21851284

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{347}}^1$

素因数の和:544

約数の個数: 48

約数和(自身を含む): 47472768

約数和(自身を除く): 25621484

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 173, 182, 346, 347, 364, 692, 694, 1211, 1388, 2249, 2422, 2429, 4498, 4511, 4844, 4858, 8996, 9022, 9716, 15743, 18044, 31486, 31577, 60031, 62972, 63154, 120062, 126308, 240124, 420217, 780403, 840434, 1560806, 1680868, 3121612, 5462821, 10925642, 21851284]

約数ペア:

[(1, 21851284), (2, 10925642), (4, 5462821), (7, 3121612), (13, 1680868), (14, 1560806), (26, 840434), (28, 780403), (52, 420217), (91, 240124), (173, 126308), (182, 120062), (346, 63154), (347, 62972), (364, 60031), (692, 31577), (694, 31486), (1211, 18044), (1388, 15743), (2249, 9716), (2422, 9022), (2429, 8996), (4498, 4858), (4511, 4844)]