21998080

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:697

約数の個数: 80

約数和(自身を含む): 56886984

約数和(自身を除く): 34888904

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, 661, 832, 1040, 1280, 1322, 1664, 2080, 2560, 2644, 3305, 3328, 4160, 5288, 6610, 6656, 8320, 8593, 10576, 13220, 16640, 17186, 21152, 26440, 33280, 34372, 42304, 42965, 52880, 68744, 84608, 85930, 105760, 137488, 169216, 171860, 211520, 274976, 338432, 343720, 423040, 549952, 687440, 846080, 1099904, 1374880, 1692160, 2199808, 2749760, 4399616, 5499520, 10999040, 21998080]

約数ペア:

[(1, 21998080), (2, 10999040), (4, 5499520), (5, 4399616), (8, 2749760), (10, 2199808), (13, 1692160), (16, 1374880), (20, 1099904), (26, 846080), (32, 687440), (40, 549952), (52, 423040), (64, 343720), (65, 338432), (80, 274976), (104, 211520), (128, 171860), (130, 169216), (160, 137488), (208, 105760), (256, 85930), (260, 84608), (320, 68744), (416, 52880), (512, 42965), (520, 42304), (640, 34372), (661, 33280), (832, 26440), (1040, 21152), (1280, 17186), (1322, 16640), (1664, 13220), (2080, 10576), (2560, 8593), (2644, 8320), (3305, 6656), (3328, 6610), (4160, 5288)]