19870137

素因数分解:

$3^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{653}}^1$

素因数の和:699

約数の個数: 48

約数和(自身を含む): 35786880

約数和(自身を除く): 15916743

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 147, 161, 189, 207, 441, 483, 621, 653, 1127, 1323, 1449, 1959, 3381, 4347, 4571, 5877, 10143, 13713, 15019, 17631, 30429, 31997, 41139, 45057, 95991, 105133, 123417, 135171, 287973, 315399, 405513, 735931, 863919, 946197, 2207793, 2838591, 6623379, 19870137]

約数ペア:

[(1, 19870137), (3, 6623379), (7, 2838591), (9, 2207793), (21, 946197), (23, 863919), (27, 735931), (49, 405513), (63, 315399), (69, 287973), (147, 135171), (161, 123417), (189, 105133), (207, 95991), (441, 45057), (483, 41139), (621, 31997), (653, 30429), (1127, 17631), (1323, 15019), (1449, 13713), (1959, 10143), (3381, 5877), (4347, 4571)]