19997380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76913}}^1$

素因数の和:76935

約数の個数: 24

約数和(自身を含む): 45225432

約数和(自身を除く): 25228052

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76913, 153826, 307652, 384565, 769130, 999869, 1538260, 1999738, 3999476, 4999345, 9998690, 19997380]

約数ペア:

[(1, 19997380), (2, 9998690), (4, 4999345), (5, 3999476), (10, 1999738), (13, 1538260), (20, 999869), (26, 769130), (52, 384565), (65, 307652), (130, 153826), (260, 76913)]