261398115

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{787}}^1$

素因数の和:881

約数の個数: 72

約数和(自身を含む): 506832144

約数和(自身を除く): 245434029

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 61, 99, 121, 165, 183, 305, 363, 495, 549, 605, 671, 787, 915, 1089, 1815, 2013, 2361, 2745, 3355, 3935, 5445, 6039, 7083, 7381, 8657, 10065, 11805, 22143, 25971, 30195, 35415, 36905, 43285, 48007, 66429, 77913, 95227, 110715, 129855, 144021, 240035, 285681, 332145, 389565, 432063, 476135, 528077, 720105, 857043, 1428405, 1584231, 2160315, 2640385, 4285215, 4752693, 5808847, 7921155, 17426541, 23763465, 29044235, 52279623, 87132705, 261398115]

約数ペア:

[(1, 261398115), (3, 87132705), (5, 52279623), (9, 29044235), (11, 23763465), (15, 17426541), (33, 7921155), (45, 5808847), (55, 4752693), (61, 4285215), (99, 2640385), (121, 2160315), (165, 1584231), (183, 1428405), (305, 857043), (363, 720105), (495, 528077), (549, 476135), (605, 432063), (671, 389565), (787, 332145), (915, 285681), (1089, 240035), (1815, 144021), (2013, 129855), (2361, 110715), (2745, 95227), (3355, 77913), (3935, 66429), (5445, 48007), (6039, 43285), (7083, 36905), (7381, 35415), (8657, 30195), (10065, 25971), (11805, 22143)]