20405865

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1861}}^1$

素因数の和:1929

約数の個数: 32

約数和(自身を含む): 35392896

約数和(自身を除く): 14987031

約数列:

[1, 3, 5, 15, 17, 43, 51, 85, 129, 215, 255, 645, 731, 1861, 2193, 3655, 5583, 9305, 10965, 27915, 31637, 80023, 94911, 158185, 240069, 400115, 474555, 1200345, 1360391, 4081173, 6801955, 20405865]

約数ペア:

[(1, 20405865), (3, 6801955), (5, 4081173), (15, 1360391), (17, 1200345), (43, 474555), (51, 400115), (85, 240069), (129, 158185), (215, 94911), (255, 80023), (645, 31637), (731, 27915), (1861, 10965), (2193, 9305), (3655, 5583)]