21751675

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 10746245

約数列:

[1, 5, 11, 19, 23, 25, 55, 95, 115, 181, 209, 253, 275, 437, 475, 575, 905, 1045, 1265, 1991, 2185, 3439, 4163, 4525, 4807, 5225, 6325, 9955, 10925, 17195, 20815, 24035, 37829, 45793, 49775, 79097, 85975, 104075, 120175, 189145, 228965, 395485, 870067, 945725, 1144825, 1977425, 4350335, 21751675]

約数ペア:

[(1, 21751675), (5, 4350335), (11, 1977425), (19, 1144825), (23, 945725), (25, 870067), (55, 395485), (95, 228965), (115, 189145), (181, 120175), (209, 104075), (253, 85975), (275, 79097), (437, 49775), (475, 45793), (575, 37829), (905, 24035), (1045, 20815), (1265, 17195), (1991, 10925), (2185, 9955), (3439, 6325), (4163, 5225), (4525, 4807)]