31287905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 43908480

約数和(自身を除く): 12620575

約数列:

[1, 5, 11, 17, 55, 85, 109, 187, 307, 545, 935, 1199, 1535, 1853, 3377, 5219, 5995, 9265, 16885, 20383, 26095, 33463, 57409, 101915, 167315, 287045, 368093, 568871, 1840465, 2844355, 6257581, 31287905]

約数ペア:

[(1, 31287905), (5, 6257581), (11, 2844355), (17, 1840465), (55, 568871), (85, 368093), (109, 287045), (187, 167315), (307, 101915), (545, 57409), (935, 33463), (1199, 26095), (1535, 20383), (1853, 16885), (3377, 9265), (5219, 5995)]