19996912

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{757}}^1$

素因数の和:905

約数の個数: 40

約数和(自身を含む): 42108416

約数和(自身を除く): 22111504

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 127, 208, 254, 508, 757, 1016, 1514, 1651, 2032, 3028, 3302, 6056, 6604, 9841, 12112, 13208, 19682, 26416, 39364, 78728, 96139, 157456, 192278, 384556, 769112, 1249807, 1538224, 2499614, 4999228, 9998456, 19996912]

約数ペア:

[(1, 19996912), (2, 9998456), (4, 4999228), (8, 2499614), (13, 1538224), (16, 1249807), (26, 769112), (52, 384556), (104, 192278), (127, 157456), (208, 96139), (254, 78728), (508, 39364), (757, 26416), (1016, 19682), (1514, 13208), (1651, 12112), (2032, 9841), (3028, 6604), (3302, 6056)]