21104545

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 33094656

約数和(自身を除く): 11990111

約数列:

[1, 5, 7, 11, 35, 41, 49, 55, 77, 191, 205, 245, 287, 385, 451, 539, 955, 1337, 1435, 2009, 2101, 2255, 2695, 3157, 6685, 7831, 9359, 10045, 10505, 14707, 15785, 22099, 39155, 46795, 54817, 73535, 86141, 102949, 110495, 274085, 383719, 430705, 514745, 602987, 1918595, 3014935, 4220909, 21104545]

約数ペア:

[(1, 21104545), (5, 4220909), (7, 3014935), (11, 1918595), (35, 602987), (41, 514745), (49, 430705), (55, 383719), (77, 274085), (191, 110495), (205, 102949), (245, 86141), (287, 73535), (385, 54817), (451, 46795), (539, 39155), (955, 22099), (1337, 15785), (1435, 14707), (2009, 10505), (2101, 10045), (2255, 9359), (2695, 7831), (3157, 6685)]