21130240

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4127}}^1$

素因数の和:4152

約数の個数: 44

約数和(自身を含む): 50700096

約数和(自身を除く): 29569856

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4127, 5120, 8254, 16508, 20635, 33016, 41270, 66032, 82540, 132064, 165080, 264128, 330160, 528256, 660320, 1056512, 1320640, 2113024, 2641280, 4226048, 5282560, 10565120, 21130240]

約数ペア:

[(1, 21130240), (2, 10565120), (4, 5282560), (5, 4226048), (8, 2641280), (10, 2113024), (16, 1320640), (20, 1056512), (32, 660320), (40, 528256), (64, 330160), (80, 264128), (128, 165080), (160, 132064), (256, 82540), (320, 66032), (512, 41270), (640, 33016), (1024, 20635), (1280, 16508), (2560, 8254), (4127, 5120)]