20549120

素因数分解:

$2^9\times 5^1\times {\mathrm{23}}^1\times {\mathrm{349}}^1$

素因数の和:395

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 31010080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 349, 368, 460, 512, 640, 698, 736, 920, 1280, 1396, 1472, 1745, 1840, 2560, 2792, 2944, 3490, 3680, 5584, 5888, 6980, 7360, 8027, 11168, 11776, 13960, 14720, 16054, 22336, 27920, 29440, 32108, 40135, 44672, 55840, 58880, 64216, 80270, 89344, 111680, 128432, 160540, 178688, 223360, 256864, 321080, 446720, 513728, 642160, 893440, 1027456, 1284320, 2054912, 2568640, 4109824, 5137280, 10274560, 20549120]

約数ペア:

[(1, 20549120), (2, 10274560), (4, 5137280), (5, 4109824), (8, 2568640), (10, 2054912), (16, 1284320), (20, 1027456), (23, 893440), (32, 642160), (40, 513728), (46, 446720), (64, 321080), (80, 256864), (92, 223360), (115, 178688), (128, 160540), (160, 128432), (184, 111680), (230, 89344), (256, 80270), (320, 64216), (349, 58880), (368, 55840), (460, 44672), (512, 40135), (640, 32108), (698, 29440), (736, 27920), (920, 22336), (1280, 16054), (1396, 14720), (1472, 13960), (1745, 11776), (1840, 11168), (2560, 8027), (2792, 7360), (2944, 6980), (3490, 5888), (3680, 5584)]