390000640

素因数分解:

$2^{12}\times 5^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:305

約数の個数: 104

約数和(自身を含む): 949500720

約数和(自身を除く): 559500080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 137, 139, 160, 256, 274, 278, 320, 512, 548, 556, 640, 685, 695, 1024, 1096, 1112, 1280, 1370, 1390, 2048, 2192, 2224, 2560, 2740, 2780, 4096, 4384, 4448, 5120, 5480, 5560, 8768, 8896, 10240, 10960, 11120, 17536, 17792, 19043, 20480, 21920, 22240, 35072, 35584, 38086, 43840, 44480, 70144, 71168, 76172, 87680, 88960, 95215, 140288, 142336, 152344, 175360, 177920, 190430, 280576, 284672, 304688, 350720, 355840, 380860, 561152, 569344, 609376, 701440, 711680, 761720, 1218752, 1402880, 1423360, 1523440, 2437504, 2805760, 2846720, 3046880, 4875008, 6093760, 9750016, 12187520, 19500032, 24375040, 39000064, 48750080, 78000128, 97500160, 195000320, 390000640]

約数ペア:

[(1, 390000640), (2, 195000320), (4, 97500160), (5, 78000128), (8, 48750080), (10, 39000064), (16, 24375040), (20, 19500032), (32, 12187520), (40, 9750016), (64, 6093760), (80, 4875008), (128, 3046880), (137, 2846720), (139, 2805760), (160, 2437504), (256, 1523440), (274, 1423360), (278, 1402880), (320, 1218752), (512, 761720), (548, 711680), (556, 701440), (640, 609376), (685, 569344), (695, 561152), (1024, 380860), (1096, 355840), (1112, 350720), (1280, 304688), (1370, 284672), (1390, 280576), (2048, 190430), (2192, 177920), (2224, 175360), (2560, 152344), (2740, 142336), (2780, 140288), (4096, 95215), (4384, 88960), (4448, 87680), (5120, 76172), (5480, 71168), (5560, 70144), (8768, 44480), (8896, 43840), (10240, 38086), (10960, 35584), (11120, 35072), (17536, 22240), (17792, 21920), (19043, 20480)]