28438420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{439}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 62092800

約数和(自身を除く): 33654380

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 395, 410, 439, 790, 820, 878, 1580, 1756, 2195, 3239, 4390, 6478, 8780, 12956, 16195, 17999, 32390, 34681, 35998, 64780, 69362, 71996, 89995, 138724, 173405, 179990, 346810, 359980, 693620, 1421921, 2843842, 5687684, 7109605, 14219210, 28438420]

約数ペア:

[(1, 28438420), (2, 14219210), (4, 7109605), (5, 5687684), (10, 2843842), (20, 1421921), (41, 693620), (79, 359980), (82, 346810), (158, 179990), (164, 173405), (205, 138724), (316, 89995), (395, 71996), (410, 69362), (439, 64780), (790, 35998), (820, 34681), (878, 32390), (1580, 17999), (1756, 16195), (2195, 12956), (3239, 8780), (4390, 6478)]