21390590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{9679}}^1$

素因数の和:9716

約数の個数: 32

約数和(自身を含む): 43908480

約数和(自身を除く): 22517890

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 85, 130, 170, 221, 442, 1105, 2210, 9679, 19358, 48395, 96790, 125827, 164543, 251654, 329086, 629135, 822715, 1258270, 1645430, 2139059, 4278118, 10695295, 21390590]

約数ペア:

[(1, 21390590), (2, 10695295), (5, 4278118), (10, 2139059), (13, 1645430), (17, 1258270), (26, 822715), (34, 629135), (65, 329086), (85, 251654), (130, 164543), (170, 125827), (221, 96790), (442, 48395), (1105, 19358), (2210, 9679)]