21921056

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:321

約数の個数: 48

約数和(自身を含む): 44906400

約数和(自身を除く): 22985344

約数列:

[1, 2, 4, 8, 16, 32, 43, 86, 89, 172, 178, 179, 344, 356, 358, 688, 712, 716, 1376, 1424, 1432, 2848, 2864, 3827, 5728, 7654, 7697, 15308, 15394, 15931, 30616, 30788, 31862, 61232, 61576, 63724, 122464, 123152, 127448, 246304, 254896, 509792, 685033, 1370066, 2740132, 5480264, 10960528, 21921056]

約数ペア:

[(1, 21921056), (2, 10960528), (4, 5480264), (8, 2740132), (16, 1370066), (32, 685033), (43, 509792), (86, 254896), (89, 246304), (172, 127448), (178, 123152), (179, 122464), (344, 63724), (356, 61576), (358, 61232), (688, 31862), (712, 30788), (716, 30616), (1376, 15931), (1424, 15394), (1432, 15308), (2848, 7697), (2864, 7654), (3827, 5728)]