20877105

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:214

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17830095

約数列:

[1, 3, 5, 15, 17, 19, 31, 51, 57, 85, 93, 95, 139, 155, 255, 285, 323, 417, 465, 527, 589, 695, 969, 1581, 1615, 1767, 2085, 2363, 2635, 2641, 2945, 4309, 4845, 7089, 7905, 7923, 8835, 10013, 11815, 12927, 13205, 21545, 30039, 35445, 39615, 44897, 50065, 64635, 73253, 81871, 134691, 150195, 219759, 224485, 245613, 366265, 409355, 673455, 1098795, 1228065, 1391807, 4175421, 6959035, 20877105]

約数ペア:

[(1, 20877105), (3, 6959035), (5, 4175421), (15, 1391807), (17, 1228065), (19, 1098795), (31, 673455), (51, 409355), (57, 366265), (85, 245613), (93, 224485), (95, 219759), (139, 150195), (155, 134691), (255, 81871), (285, 73253), (323, 64635), (417, 50065), (465, 44897), (527, 39615), (589, 35445), (695, 30039), (969, 21545), (1581, 13205), (1615, 12927), (1767, 11815), (2085, 10013), (2363, 8835), (2635, 7923), (2641, 7905), (2945, 7089), (4309, 4845)]