21259469

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{149}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 7252531

約数列:

[1, 7, 11, 17, 77, 109, 119, 149, 187, 763, 1043, 1199, 1309, 1639, 1853, 2533, 8393, 11473, 12971, 16241, 17731, 20383, 27863, 113687, 142681, 178651, 195041, 276097, 1250557, 1932679, 3037067, 21259469]

約数ペア:

[(1, 21259469), (7, 3037067), (11, 1932679), (17, 1250557), (77, 276097), (109, 195041), (119, 178651), (149, 142681), (187, 113687), (763, 27863), (1043, 20383), (1199, 17731), (1309, 16241), (1639, 12971), (1853, 11473), (2533, 8393)]