638866412

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{1861}}^1\times {\mathrm{4517}}^1$

素因数の和:6401

約数の個数: 24

約数和(自身を含む): 1177752240

約数和(自身を除く): 538885828

約数列:

[1, 2, 4, 19, 38, 76, 1861, 3722, 4517, 7444, 9034, 18068, 35359, 70718, 85823, 141436, 171646, 343292, 8406137, 16812274, 33624548, 159716603, 319433206, 638866412]

約数ペア:

[(1, 638866412), (2, 319433206), (4, 159716603), (19, 33624548), (38, 16812274), (76, 8406137), (1861, 343292), (3722, 171646), (4517, 141436), (7444, 85823), (9034, 70718), (18068, 35359)]