21572560

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6577}}^1$

素因数の和:6631

約数の個数: 40

約数和(自身を含む): 51387336

約数和(自身を除く): 29814776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6577, 13154, 26308, 32885, 52616, 65770, 105232, 131540, 263080, 269657, 526160, 539314, 1078628, 1348285, 2157256, 2696570, 4314512, 5393140, 10786280, 21572560]

約数ペア:

[(1, 21572560), (2, 10786280), (4, 5393140), (5, 4314512), (8, 2696570), (10, 2157256), (16, 1348285), (20, 1078628), (40, 539314), (41, 526160), (80, 269657), (82, 263080), (164, 131540), (205, 105232), (328, 65770), (410, 52616), (656, 32885), (820, 26308), (1640, 13154), (3280, 6577)]