21032960

素因数分解:

$2^{12}\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1$

素因数の和:121

約数の個数: 104

約数和(自身を含む): 55043520

約数和(自身を除く): 34010560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 79, 80, 104, 128, 130, 158, 160, 208, 256, 260, 316, 320, 395, 416, 512, 520, 632, 640, 790, 832, 1024, 1027, 1040, 1264, 1280, 1580, 1664, 2048, 2054, 2080, 2528, 2560, 3160, 3328, 4096, 4108, 4160, 5056, 5120, 5135, 6320, 6656, 8216, 8320, 10112, 10240, 10270, 12640, 13312, 16432, 16640, 20224, 20480, 20540, 25280, 26624, 32864, 33280, 40448, 41080, 50560, 53248, 65728, 66560, 80896, 82160, 101120, 131456, 133120, 161792, 164320, 202240, 262912, 266240, 323584, 328640, 404480, 525824, 657280, 808960, 1051648, 1314560, 1617920, 2103296, 2629120, 4206592, 5258240, 10516480, 21032960]

約数ペア:

[(1, 21032960), (2, 10516480), (4, 5258240), (5, 4206592), (8, 2629120), (10, 2103296), (13, 1617920), (16, 1314560), (20, 1051648), (26, 808960), (32, 657280), (40, 525824), (52, 404480), (64, 328640), (65, 323584), (79, 266240), (80, 262912), (104, 202240), (128, 164320), (130, 161792), (158, 133120), (160, 131456), (208, 101120), (256, 82160), (260, 80896), (316, 66560), (320, 65728), (395, 53248), (416, 50560), (512, 41080), (520, 40448), (632, 33280), (640, 32864), (790, 26624), (832, 25280), (1024, 20540), (1027, 20480), (1040, 20224), (1264, 16640), (1280, 16432), (1580, 13312), (1664, 12640), (2048, 10270), (2054, 10240), (2080, 10112), (2528, 8320), (2560, 8216), (3160, 6656), (3328, 6320), (4096, 5135), (4108, 5120), (4160, 5056)]