21561304

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:220

約数の個数: 64

約数和(自身を含む): 45800640

約数和(自身を除く): 24239336

約数列:

[1, 2, 4, 8, 17, 23, 34, 46, 61, 68, 92, 113, 122, 136, 184, 226, 244, 391, 452, 488, 782, 904, 1037, 1403, 1564, 1921, 2074, 2599, 2806, 3128, 3842, 4148, 5198, 5612, 6893, 7684, 8296, 10396, 11224, 13786, 15368, 20792, 23851, 27572, 44183, 47702, 55144, 88366, 95404, 117181, 158539, 176732, 190808, 234362, 317078, 353464, 468724, 634156, 937448, 1268312, 2695163, 5390326, 10780652, 21561304]

約数ペア:

[(1, 21561304), (2, 10780652), (4, 5390326), (8, 2695163), (17, 1268312), (23, 937448), (34, 634156), (46, 468724), (61, 353464), (68, 317078), (92, 234362), (113, 190808), (122, 176732), (136, 158539), (184, 117181), (226, 95404), (244, 88366), (391, 55144), (452, 47702), (488, 44183), (782, 27572), (904, 23851), (1037, 20792), (1403, 15368), (1564, 13786), (1921, 11224), (2074, 10396), (2599, 8296), (2806, 7684), (3128, 6893), (3842, 5612), (4148, 5198)]