21273255

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 18038745

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 139, 171, 179, 285, 417, 537, 695, 855, 895, 1251, 1611, 2085, 2641, 2685, 3401, 6255, 7923, 8055, 10203, 13205, 17005, 23769, 24881, 30609, 39615, 51015, 74643, 118845, 124405, 153045, 223929, 373215, 472739, 1119645, 1418217, 2363695, 4254651, 7091085, 21273255]

約数ペア:

[(1, 21273255), (3, 7091085), (5, 4254651), (9, 2363695), (15, 1418217), (19, 1119645), (45, 472739), (57, 373215), (95, 223929), (139, 153045), (171, 124405), (179, 118845), (285, 74643), (417, 51015), (537, 39615), (695, 30609), (855, 24881), (895, 23769), (1251, 17005), (1611, 13205), (2085, 10203), (2641, 8055), (2685, 7923), (3401, 6255)]