21398868

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:341

約数の個数: 72

約数和(自身を含む): 56784000

約数和(自身を除く): 35385132

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 58, 87, 103, 116, 174, 199, 206, 261, 309, 348, 398, 412, 522, 597, 618, 796, 927, 1044, 1194, 1236, 1791, 1854, 2388, 2987, 3582, 3708, 5771, 5974, 7164, 8961, 11542, 11948, 17313, 17922, 20497, 23084, 26883, 34626, 35844, 40994, 51939, 53766, 61491, 69252, 81988, 103878, 107532, 122982, 184473, 207756, 245964, 368946, 594413, 737892, 1188826, 1783239, 2377652, 3566478, 5349717, 7132956, 10699434, 21398868]

約数ペア:

[(1, 21398868), (2, 10699434), (3, 7132956), (4, 5349717), (6, 3566478), (9, 2377652), (12, 1783239), (18, 1188826), (29, 737892), (36, 594413), (58, 368946), (87, 245964), (103, 207756), (116, 184473), (174, 122982), (199, 107532), (206, 103878), (261, 81988), (309, 69252), (348, 61491), (398, 53766), (412, 51939), (522, 40994), (597, 35844), (618, 34626), (796, 26883), (927, 23084), (1044, 20497), (1194, 17922), (1236, 17313), (1791, 11948), (1854, 11542), (2388, 8961), (2987, 7164), (3582, 5974), (3708, 5771)]