21318855

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 37453824

約数和(自身を除く): 16134969

約数列:

[1, 3, 5, 15, 19, 31, 57, 93, 95, 127, 155, 285, 361, 381, 465, 589, 635, 1083, 1767, 1805, 1905, 2413, 2945, 3937, 5415, 7239, 8835, 11191, 11811, 12065, 19685, 33573, 36195, 45847, 55955, 59055, 74803, 137541, 167865, 224409, 229235, 374015, 687705, 1122045, 1421257, 4263771, 7106285, 21318855]

約数ペア:

[(1, 21318855), (3, 7106285), (5, 4263771), (15, 1421257), (19, 1122045), (31, 687705), (57, 374015), (93, 229235), (95, 224409), (127, 167865), (155, 137541), (285, 74803), (361, 59055), (381, 55955), (465, 45847), (589, 36195), (635, 33573), (1083, 19685), (1767, 12065), (1805, 11811), (1905, 11191), (2413, 8835), (2945, 7239), (3937, 5415)]