19991812

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{181}}^1\times {\mathrm{521}}^1$

素因数の和:759

約数の個数: 24

約数和(自身を含む): 35911512

約数和(自身を除く): 15919700

約数列:

[1, 2, 4, 53, 106, 181, 212, 362, 521, 724, 1042, 2084, 9593, 19186, 27613, 38372, 55226, 94301, 110452, 188602, 377204, 4997953, 9995906, 19991812]

約数ペア:

[(1, 19991812), (2, 9995906), (4, 4997953), (53, 377204), (106, 188602), (181, 110452), (212, 94301), (362, 55226), (521, 38372), (724, 27613), (1042, 19186), (2084, 9593)]