21078736

素因数分解:

$2^4\times 7^1\times {\mathrm{53}}^2\times {\mathrm{67}}^1$

素因数の和:188

約数の個数: 60

約数和(自身を含む): 48281632

約数和(自身を除く): 27202896

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 53, 56, 67, 106, 112, 134, 212, 268, 371, 424, 469, 536, 742, 848, 938, 1072, 1484, 1876, 2809, 2968, 3551, 3752, 5618, 5936, 7102, 7504, 11236, 14204, 19663, 22472, 24857, 28408, 39326, 44944, 49714, 56816, 78652, 99428, 157304, 188203, 198856, 314608, 376406, 397712, 752812, 1317421, 1505624, 2634842, 3011248, 5269684, 10539368, 21078736]

約数ペア:

[(1, 21078736), (2, 10539368), (4, 5269684), (7, 3011248), (8, 2634842), (14, 1505624), (16, 1317421), (28, 752812), (53, 397712), (56, 376406), (67, 314608), (106, 198856), (112, 188203), (134, 157304), (212, 99428), (268, 78652), (371, 56816), (424, 49714), (469, 44944), (536, 39326), (742, 28408), (848, 24857), (938, 22472), (1072, 19663), (1484, 14204), (1876, 11236), (2809, 7504), (2968, 7102), (3551, 5936), (3752, 5618)]