21791224

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{809}}^1$

素因数の和:872

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 29919176

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 37, 52, 56, 74, 91, 104, 148, 182, 259, 296, 364, 481, 518, 728, 809, 962, 1036, 1618, 1924, 2072, 3236, 3367, 3848, 5663, 6472, 6734, 10517, 11326, 13468, 21034, 22652, 26936, 29933, 42068, 45304, 59866, 73619, 84136, 119732, 147238, 209531, 239464, 294476, 389129, 419062, 588952, 778258, 838124, 1556516, 1676248, 2723903, 3113032, 5447806, 10895612, 21791224]

約数ペア:

[(1, 21791224), (2, 10895612), (4, 5447806), (7, 3113032), (8, 2723903), (13, 1676248), (14, 1556516), (26, 838124), (28, 778258), (37, 588952), (52, 419062), (56, 389129), (74, 294476), (91, 239464), (104, 209531), (148, 147238), (182, 119732), (259, 84136), (296, 73619), (364, 59866), (481, 45304), (518, 42068), (728, 29933), (809, 26936), (962, 22652), (1036, 21034), (1618, 13468), (1924, 11326), (2072, 10517), (3236, 6734), (3367, 6472), (3848, 5663)]