20646320

素因数分解:

$2^4\times 5^1\times {\mathrm{409}}^1\times {\mathrm{631}}^1$

素因数の和:1053

約数の個数: 40

約数和(自身を含む): 48196320

約数和(自身を除く): 27550000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 409, 631, 818, 1262, 1636, 2045, 2524, 3155, 3272, 4090, 5048, 6310, 6544, 8180, 10096, 12620, 16360, 25240, 32720, 50480, 258079, 516158, 1032316, 1290395, 2064632, 2580790, 4129264, 5161580, 10323160, 20646320]

約数ペア:

[(1, 20646320), (2, 10323160), (4, 5161580), (5, 4129264), (8, 2580790), (10, 2064632), (16, 1290395), (20, 1032316), (40, 516158), (80, 258079), (409, 50480), (631, 32720), (818, 25240), (1262, 16360), (1636, 12620), (2045, 10096), (2524, 8180), (3155, 6544), (3272, 6310), (4090, 5048)]