21385448

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:246

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 26514712

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 83, 86, 107, 166, 172, 214, 301, 332, 344, 428, 581, 602, 664, 749, 856, 1162, 1204, 1498, 2324, 2408, 2996, 3569, 4601, 4648, 5992, 7138, 8881, 9202, 14276, 17762, 18404, 24983, 28552, 32207, 35524, 36808, 49966, 62167, 64414, 71048, 99932, 124334, 128828, 199864, 248668, 257656, 381883, 497336, 763766, 1527532, 2673181, 3055064, 5346362, 10692724, 21385448]

約数ペア:

[(1, 21385448), (2, 10692724), (4, 5346362), (7, 3055064), (8, 2673181), (14, 1527532), (28, 763766), (43, 497336), (56, 381883), (83, 257656), (86, 248668), (107, 199864), (166, 128828), (172, 124334), (214, 99932), (301, 71048), (332, 64414), (344, 62167), (428, 49966), (581, 36808), (602, 35524), (664, 32207), (749, 28552), (856, 24983), (1162, 18404), (1204, 17762), (1498, 14276), (2324, 9202), (2408, 8881), (2996, 7138), (3569, 5992), (4601, 4648)]