20728916

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{179}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 21183724

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 131, 179, 221, 262, 358, 442, 524, 716, 884, 1703, 2227, 2327, 3043, 3406, 4454, 4654, 6086, 6812, 8908, 9308, 12172, 23449, 28951, 39559, 46898, 57902, 79118, 93796, 115804, 158236, 304837, 398633, 609674, 797266, 1219348, 1594532, 5182229, 10364458, 20728916]

約数ペア:

[(1, 20728916), (2, 10364458), (4, 5182229), (13, 1594532), (17, 1219348), (26, 797266), (34, 609674), (52, 398633), (68, 304837), (131, 158236), (179, 115804), (221, 93796), (262, 79118), (358, 57902), (442, 46898), (524, 39559), (716, 28951), (884, 23449), (1703, 12172), (2227, 9308), (2327, 8908), (3043, 6812), (3406, 6086), (4454, 4654)]