21109284

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{211}}^1\times {\mathrm{397}}^1$

素因数の和:625

約数の個数: 72

約数和(自身を含む): 61425728

約数和(自身を除く): 40316444

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 211, 252, 397, 422, 633, 794, 844, 1191, 1266, 1477, 1588, 1899, 2382, 2532, 2779, 2954, 3573, 3798, 4431, 4764, 5558, 5908, 7146, 7596, 8337, 8862, 11116, 13293, 14292, 16674, 17724, 25011, 26586, 33348, 50022, 53172, 83767, 100044, 167534, 251301, 335068, 502602, 586369, 753903, 1005204, 1172738, 1507806, 1759107, 2345476, 3015612, 3518214, 5277321, 7036428, 10554642, 21109284]

約数ペア:

[(1, 21109284), (2, 10554642), (3, 7036428), (4, 5277321), (6, 3518214), (7, 3015612), (9, 2345476), (12, 1759107), (14, 1507806), (18, 1172738), (21, 1005204), (28, 753903), (36, 586369), (42, 502602), (63, 335068), (84, 251301), (126, 167534), (211, 100044), (252, 83767), (397, 53172), (422, 50022), (633, 33348), (794, 26586), (844, 25011), (1191, 17724), (1266, 16674), (1477, 14292), (1588, 13293), (1899, 11116), (2382, 8862), (2532, 8337), (2779, 7596), (2954, 7146), (3573, 5908), (3798, 5558), (4431, 4764)]