261452080

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{1009}}^1$

素因数の和:1142

約数の個数: 80

約数和(自身を含む): 631209600

約数和(自身を除く): 369757520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 79, 80, 82, 158, 164, 205, 316, 328, 395, 410, 632, 656, 790, 820, 1009, 1264, 1580, 1640, 2018, 3160, 3239, 3280, 4036, 5045, 6320, 6478, 8072, 10090, 12956, 16144, 16195, 20180, 25912, 32390, 40360, 41369, 51824, 64780, 79711, 80720, 82738, 129560, 159422, 165476, 206845, 259120, 318844, 330952, 398555, 413690, 637688, 661904, 797110, 827380, 1275376, 1594220, 1654760, 3188440, 3268151, 3309520, 6376880, 6536302, 13072604, 16340755, 26145208, 32681510, 52290416, 65363020, 130726040, 261452080]

約数ペア:

[(1, 261452080), (2, 130726040), (4, 65363020), (5, 52290416), (8, 32681510), (10, 26145208), (16, 16340755), (20, 13072604), (40, 6536302), (41, 6376880), (79, 3309520), (80, 3268151), (82, 3188440), (158, 1654760), (164, 1594220), (205, 1275376), (316, 827380), (328, 797110), (395, 661904), (410, 637688), (632, 413690), (656, 398555), (790, 330952), (820, 318844), (1009, 259120), (1264, 206845), (1580, 165476), (1640, 159422), (2018, 129560), (3160, 82738), (3239, 80720), (3280, 79711), (4036, 64780), (5045, 51824), (6320, 41369), (6478, 40360), (8072, 32390), (10090, 25912), (12956, 20180), (16144, 16195)]