18989425

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 30748032

約数和(自身を除く): 11758607

約数列:

[1, 5, 7, 13, 17, 25, 35, 65, 85, 91, 119, 175, 221, 325, 425, 455, 491, 595, 1105, 1547, 2275, 2455, 2975, 3437, 5525, 6383, 7735, 8347, 12275, 17185, 31915, 38675, 41735, 44681, 58429, 85925, 108511, 159575, 208675, 223405, 292145, 542555, 759577, 1117025, 1460725, 2712775, 3797885, 18989425]

約数ペア:

[(1, 18989425), (5, 3797885), (7, 2712775), (13, 1460725), (17, 1117025), (25, 759577), (35, 542555), (65, 292145), (85, 223405), (91, 208675), (119, 159575), (175, 108511), (221, 85925), (325, 58429), (425, 44681), (455, 41735), (491, 38675), (595, 31915), (1105, 17185), (1547, 12275), (2275, 8347), (2455, 7735), (2975, 6383), (3437, 5525)]