19884963

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:152

約数の個数: 48

約数和(自身を含む): 33259776

約数和(自身を除く): 13374813

約数列:

[1, 3, 7, 19, 21, 43, 57, 61, 129, 133, 183, 301, 361, 399, 427, 817, 903, 1083, 1159, 1281, 2451, 2527, 2623, 3477, 5719, 7581, 7869, 8113, 15523, 17157, 18361, 22021, 24339, 46569, 49837, 55083, 66063, 108661, 149511, 154147, 325983, 348859, 462441, 946903, 1046577, 2840709, 6628321, 19884963]

約数ペア:

[(1, 19884963), (3, 6628321), (7, 2840709), (19, 1046577), (21, 946903), (43, 462441), (57, 348859), (61, 325983), (129, 154147), (133, 149511), (183, 108661), (301, 66063), (361, 55083), (399, 49837), (427, 46569), (817, 24339), (903, 22021), (1083, 18361), (1159, 17157), (1281, 15523), (2451, 8113), (2527, 7869), (2623, 7581), (3477, 5719)]