21111272

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{617}}^1$

素因数の和:690

約数の個数: 64

約数和(自身を含む): 49835520

約数和(自身を除く): 28724248

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 47, 52, 56, 91, 94, 104, 182, 188, 329, 364, 376, 611, 617, 658, 728, 1222, 1234, 1316, 2444, 2468, 2632, 4277, 4319, 4888, 4936, 8021, 8554, 8638, 16042, 17108, 17276, 28999, 32084, 34216, 34552, 56147, 57998, 64168, 112294, 115996, 202993, 224588, 231992, 376987, 405986, 449176, 753974, 811972, 1507948, 1623944, 2638909, 3015896, 5277818, 10555636, 21111272]

約数ペア:

[(1, 21111272), (2, 10555636), (4, 5277818), (7, 3015896), (8, 2638909), (13, 1623944), (14, 1507948), (26, 811972), (28, 753974), (47, 449176), (52, 405986), (56, 376987), (91, 231992), (94, 224588), (104, 202993), (182, 115996), (188, 112294), (329, 64168), (364, 57998), (376, 56147), (611, 34552), (617, 34216), (658, 32084), (728, 28999), (1222, 17276), (1234, 17108), (1316, 16042), (2444, 8638), (2468, 8554), (2632, 8021), (4277, 4936), (4319, 4888)]