21207040

素因数分解:

$2^{11}\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1$

素因数の和:155

約数の個数: 96

約数和(自身を含む): 54054000

約数和(自身を除く): 32846960

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 109, 128, 152, 160, 190, 218, 256, 304, 320, 380, 436, 512, 545, 608, 640, 760, 872, 1024, 1090, 1216, 1280, 1520, 1744, 2048, 2071, 2180, 2432, 2560, 3040, 3488, 4142, 4360, 4864, 5120, 6080, 6976, 8284, 8720, 9728, 10240, 10355, 12160, 13952, 16568, 17440, 19456, 20710, 24320, 27904, 33136, 34880, 38912, 41420, 48640, 55808, 66272, 69760, 82840, 97280, 111616, 132544, 139520, 165680, 194560, 223232, 265088, 279040, 331360, 530176, 558080, 662720, 1060352, 1116160, 1325440, 2120704, 2650880, 4241408, 5301760, 10603520, 21207040]

約数ペア:

[(1, 21207040), (2, 10603520), (4, 5301760), (5, 4241408), (8, 2650880), (10, 2120704), (16, 1325440), (19, 1116160), (20, 1060352), (32, 662720), (38, 558080), (40, 530176), (64, 331360), (76, 279040), (80, 265088), (95, 223232), (109, 194560), (128, 165680), (152, 139520), (160, 132544), (190, 111616), (218, 97280), (256, 82840), (304, 69760), (320, 66272), (380, 55808), (436, 48640), (512, 41420), (545, 38912), (608, 34880), (640, 33136), (760, 27904), (872, 24320), (1024, 20710), (1090, 19456), (1216, 17440), (1280, 16568), (1520, 13952), (1744, 12160), (2048, 10355), (2071, 10240), (2180, 9728), (2432, 8720), (2560, 8284), (3040, 6976), (3488, 6080), (4142, 5120), (4360, 4864)]