20642505

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{479}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 37946880

約数和(自身を除く): 17304375

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 169, 195, 221, 255, 479, 507, 663, 845, 1105, 1437, 2395, 2535, 2873, 3315, 6227, 7185, 8143, 8619, 14365, 18681, 24429, 31135, 40715, 43095, 80951, 93405, 105859, 122145, 242853, 317577, 404755, 529295, 1214265, 1376167, 1587885, 4128501, 6880835, 20642505]

約数ペア:

[(1, 20642505), (3, 6880835), (5, 4128501), (13, 1587885), (15, 1376167), (17, 1214265), (39, 529295), (51, 404755), (65, 317577), (85, 242853), (169, 122145), (195, 105859), (221, 93405), (255, 80951), (479, 43095), (507, 40715), (663, 31135), (845, 24429), (1105, 18681), (1437, 14365), (2395, 8619), (2535, 8143), (2873, 7185), (3315, 6227)]