81489920

素因数分解:

$2^{12}\times 5^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:225

約数の個数: 104

約数和(自身を含む): 205233696

約数和(自身を除く): 123743776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 173, 184, 230, 256, 320, 346, 368, 460, 512, 640, 692, 736, 865, 920, 1024, 1280, 1384, 1472, 1730, 1840, 2048, 2560, 2768, 2944, 3460, 3680, 3979, 4096, 5120, 5536, 5888, 6920, 7360, 7958, 10240, 11072, 11776, 13840, 14720, 15916, 19895, 20480, 22144, 23552, 27680, 29440, 31832, 39790, 44288, 47104, 55360, 58880, 63664, 79580, 88576, 94208, 110720, 117760, 127328, 159160, 177152, 221440, 235520, 254656, 318320, 354304, 442880, 471040, 509312, 636640, 708608, 885760, 1018624, 1273280, 1771520, 2037248, 2546560, 3543040, 4074496, 5093120, 8148992, 10186240, 16297984, 20372480, 40744960, 81489920]

約数ペア:

[(1, 81489920), (2, 40744960), (4, 20372480), (5, 16297984), (8, 10186240), (10, 8148992), (16, 5093120), (20, 4074496), (23, 3543040), (32, 2546560), (40, 2037248), (46, 1771520), (64, 1273280), (80, 1018624), (92, 885760), (115, 708608), (128, 636640), (160, 509312), (173, 471040), (184, 442880), (230, 354304), (256, 318320), (320, 254656), (346, 235520), (368, 221440), (460, 177152), (512, 159160), (640, 127328), (692, 117760), (736, 110720), (865, 94208), (920, 88576), (1024, 79580), (1280, 63664), (1384, 58880), (1472, 55360), (1730, 47104), (1840, 44288), (2048, 39790), (2560, 31832), (2768, 29440), (2944, 27680), (3460, 23552), (3680, 22144), (3979, 20480), (4096, 19895), (5120, 15916), (5536, 14720), (5888, 13840), (6920, 11776), (7360, 11072), (7958, 10240)]