20625320

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 48211200

約数和(自身を除く): 27585880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 79, 107, 122, 158, 214, 244, 305, 316, 395, 428, 488, 535, 610, 632, 790, 856, 1070, 1220, 1580, 2140, 2440, 3160, 4280, 4819, 6527, 8453, 9638, 13054, 16906, 19276, 24095, 26108, 32635, 33812, 38552, 42265, 48190, 52216, 65270, 67624, 84530, 96380, 130540, 169060, 192760, 261080, 338120, 515633, 1031266, 2062532, 2578165, 4125064, 5156330, 10312660, 20625320]

約数ペア:

[(1, 20625320), (2, 10312660), (4, 5156330), (5, 4125064), (8, 2578165), (10, 2062532), (20, 1031266), (40, 515633), (61, 338120), (79, 261080), (107, 192760), (122, 169060), (158, 130540), (214, 96380), (244, 84530), (305, 67624), (316, 65270), (395, 52216), (428, 48190), (488, 42265), (535, 38552), (610, 33812), (632, 32635), (790, 26108), (856, 24095), (1070, 19276), (1220, 16906), (1580, 13054), (2140, 9638), (2440, 8453), (3160, 6527), (4280, 4819)]