20377885

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 28304640

約数和(自身を除く): 7926755

約数列:

[1, 5, 11, 23, 55, 89, 115, 181, 253, 445, 905, 979, 1265, 1991, 2047, 4163, 4895, 9955, 10235, 16109, 20815, 22517, 45793, 80545, 112585, 177199, 228965, 370507, 885995, 1852535, 4075577, 20377885]

約数ペア:

[(1, 20377885), (5, 4075577), (11, 1852535), (23, 885995), (55, 370507), (89, 228965), (115, 177199), (181, 112585), (253, 80545), (445, 45793), (905, 22517), (979, 20815), (1265, 16109), (1991, 10235), (2047, 9955), (4163, 4895)]