21731840

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{653}}^1$

素因数の和:689

約数の個数: 80

約数和(自身を含む): 56199528

約数和(自身を除く): 34467688

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 653, 832, 1040, 1280, 1306, 1664, 2080, 2560, 2612, 3265, 3328, 4160, 5224, 6530, 6656, 8320, 8489, 10448, 13060, 16640, 16978, 20896, 26120, 33280, 33956, 41792, 42445, 52240, 67912, 83584, 84890, 104480, 135824, 167168, 169780, 208960, 271648, 334336, 339560, 417920, 543296, 679120, 835840, 1086592, 1358240, 1671680, 2173184, 2716480, 4346368, 5432960, 10865920, 21731840]

約数ペア:

[(1, 21731840), (2, 10865920), (4, 5432960), (5, 4346368), (8, 2716480), (10, 2173184), (13, 1671680), (16, 1358240), (20, 1086592), (26, 835840), (32, 679120), (40, 543296), (52, 417920), (64, 339560), (65, 334336), (80, 271648), (104, 208960), (128, 169780), (130, 167168), (160, 135824), (208, 104480), (256, 84890), (260, 83584), (320, 67912), (416, 52240), (512, 42445), (520, 41792), (640, 33956), (653, 33280), (832, 26120), (1040, 20896), (1280, 16978), (1306, 16640), (1664, 13060), (2080, 10448), (2560, 8489), (2612, 8320), (3265, 6656), (3328, 6530), (4160, 5224)]