21628828

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{569}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 22612292

約数列:

[1, 2, 4, 13, 17, 26, 34, 43, 52, 68, 86, 172, 221, 442, 559, 569, 731, 884, 1118, 1138, 1462, 2236, 2276, 2924, 7397, 9503, 9673, 14794, 19006, 19346, 24467, 29588, 38012, 38692, 48934, 97868, 125749, 251498, 318071, 415939, 502996, 636142, 831878, 1272284, 1663756, 5407207, 10814414, 21628828]

約数ペア:

[(1, 21628828), (2, 10814414), (4, 5407207), (13, 1663756), (17, 1272284), (26, 831878), (34, 636142), (43, 502996), (52, 415939), (68, 318071), (86, 251498), (172, 125749), (221, 97868), (442, 48934), (559, 38692), (569, 38012), (731, 29588), (884, 24467), (1118, 19346), (1138, 19006), (1462, 14794), (2236, 9673), (2276, 9503), (2924, 7397)]