18945905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{881}}^1$

素因数の和:937

約数の個数: 32

約数和(自身を含む): 27433728

約数和(自身を除く): 8487823

約数列:

[1, 5, 11, 17, 23, 55, 85, 115, 187, 253, 391, 881, 935, 1265, 1955, 4301, 4405, 9691, 14977, 20263, 21505, 48455, 74885, 101315, 164747, 222893, 344471, 823735, 1114465, 1722355, 3789181, 18945905]

約数ペア:

[(1, 18945905), (5, 3789181), (11, 1722355), (17, 1114465), (23, 823735), (55, 344471), (85, 222893), (115, 164747), (187, 101315), (253, 74885), (391, 48455), (881, 21505), (935, 20263), (1265, 14977), (1955, 9691), (4301, 4405)]