208520725

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:108

約数の個数: 108

約数和(自身を含む): 347180160

約数和(自身を除く): 138659435

約数列:

[1, 5, 7, 17, 19, 25, 31, 35, 49, 85, 95, 119, 133, 155, 175, 217, 245, 289, 323, 425, 475, 527, 589, 595, 665, 775, 833, 931, 1085, 1225, 1445, 1519, 1615, 2023, 2261, 2635, 2945, 2975, 3325, 3689, 4123, 4165, 4655, 5425, 5491, 7225, 7595, 8075, 8959, 10013, 10115, 11305, 13175, 14161, 14725, 15827, 18445, 20615, 20825, 23275, 25823, 27455, 28861, 37975, 38437, 44795, 50065, 50575, 56525, 62713, 70091, 70805, 79135, 92225, 103075, 129115, 137275, 144305, 170221, 192185, 223975, 250325, 269059, 313565, 350455, 354025, 395675, 438991, 490637, 645575, 721525, 851105, 960925, 1191547, 1345295, 1567825, 1752275, 2194955, 2453185, 4255525, 5957735, 6726475, 8340829, 10974775, 12265925, 29788675, 41704145, 208520725]

約数ペア:

[(1, 208520725), (5, 41704145), (7, 29788675), (17, 12265925), (19, 10974775), (25, 8340829), (31, 6726475), (35, 5957735), (49, 4255525), (85, 2453185), (95, 2194955), (119, 1752275), (133, 1567825), (155, 1345295), (175, 1191547), (217, 960925), (245, 851105), (289, 721525), (323, 645575), (425, 490637), (475, 438991), (527, 395675), (589, 354025), (595, 350455), (665, 313565), (775, 269059), (833, 250325), (931, 223975), (1085, 192185), (1225, 170221), (1445, 144305), (1519, 137275), (1615, 129115), (2023, 103075), (2261, 92225), (2635, 79135), (2945, 70805), (2975, 70091), (3325, 62713), (3689, 56525), (4123, 50575), (4165, 50065), (4655, 44795), (5425, 38437), (5491, 37975), (7225, 28861), (7595, 27455), (8075, 25823), (8959, 23275), (10013, 20825), (10115, 20615), (11305, 18445), (13175, 15827), (14161, 14725)]