20853880

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4783}}^1$

素因数の和:4903

約数の個数: 32

約数和(自身を含む): 47361600

約数和(自身を除く): 26507720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4783, 9566, 19132, 23915, 38264, 47830, 95660, 191320, 521347, 1042694, 2085388, 2606735, 4170776, 5213470, 10426940, 20853880]

約数ペア:

[(1, 20853880), (2, 10426940), (4, 5213470), (5, 4170776), (8, 2606735), (10, 2085388), (20, 1042694), (40, 521347), (109, 191320), (218, 95660), (436, 47830), (545, 38264), (872, 23915), (1090, 19132), (2180, 9566), (4360, 4783)]