21478780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{881}}^1$

素因数の和:966

約数の個数: 48

約数和(自身を含む): 48009024

約数和(自身を除く): 26530244

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 53, 92, 106, 115, 212, 230, 265, 460, 530, 881, 1060, 1219, 1762, 2438, 3524, 4405, 4876, 6095, 8810, 12190, 17620, 20263, 24380, 40526, 46693, 81052, 93386, 101315, 186772, 202630, 233465, 405260, 466930, 933860, 1073939, 2147878, 4295756, 5369695, 10739390, 21478780]

約数ペア:

[(1, 21478780), (2, 10739390), (4, 5369695), (5, 4295756), (10, 2147878), (20, 1073939), (23, 933860), (46, 466930), (53, 405260), (92, 233465), (106, 202630), (115, 186772), (212, 101315), (230, 93386), (265, 81052), (460, 46693), (530, 40526), (881, 24380), (1060, 20263), (1219, 17620), (1762, 12190), (2438, 8810), (3524, 6095), (4405, 4876)]