21045284

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 41395200

約数和(自身を除く): 20349916

約数列:

[1, 2, 4, 13, 26, 47, 52, 79, 94, 109, 158, 188, 218, 316, 436, 611, 1027, 1222, 1417, 2054, 2444, 2834, 3713, 4108, 5123, 5668, 7426, 8611, 10246, 14852, 17222, 20492, 34444, 48269, 66599, 96538, 111943, 133198, 193076, 223886, 266396, 404717, 447772, 809434, 1618868, 5261321, 10522642, 21045284]

約数ペア:

[(1, 21045284), (2, 10522642), (4, 5261321), (13, 1618868), (26, 809434), (47, 447772), (52, 404717), (79, 266396), (94, 223886), (109, 193076), (158, 133198), (188, 111943), (218, 96538), (316, 66599), (436, 48269), (611, 34444), (1027, 20492), (1222, 17222), (1417, 14852), (2054, 10246), (2444, 8611), (2834, 7426), (3713, 5668), (4108, 5123)]