18988915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{883}}^1$

素因数の和:939

約数の個数: 32

約数和(自身を含む): 27495936

約数和(自身を除く): 8507021

約数列:

[1, 5, 11, 17, 23, 55, 85, 115, 187, 253, 391, 883, 935, 1265, 1955, 4301, 4415, 9713, 15011, 20309, 21505, 48565, 75055, 101545, 165121, 223399, 345253, 825605, 1116995, 1726265, 3797783, 18988915]

約数ペア:

[(1, 18988915), (5, 3797783), (11, 1726265), (17, 1116995), (23, 825605), (55, 345253), (85, 223399), (115, 165121), (187, 101545), (253, 75055), (391, 48565), (883, 21505), (935, 20309), (1265, 15011), (1955, 9713), (4301, 4415)]