19967255

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 31518720

約数和(自身を除く): 11551465

約数列:

[1, 5, 7, 11, 31, 35, 49, 55, 77, 155, 217, 239, 245, 341, 385, 539, 1085, 1195, 1519, 1673, 1705, 2387, 2629, 2695, 7409, 7595, 8365, 11711, 11935, 13145, 16709, 18403, 37045, 51863, 58555, 81499, 83545, 92015, 128821, 259315, 363041, 407495, 570493, 644105, 1815205, 2852465, 3993451, 19967255]

約数ペア:

[(1, 19967255), (5, 3993451), (7, 2852465), (11, 1815205), (31, 644105), (35, 570493), (49, 407495), (55, 363041), (77, 259315), (155, 128821), (217, 92015), (239, 83545), (245, 81499), (341, 58555), (385, 51863), (539, 37045), (1085, 18403), (1195, 16709), (1519, 13145), (1673, 11935), (1705, 11711), (2387, 8365), (2629, 7595), (2695, 7409)]