21407889

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 31426560

約数和(自身を除く): 10018671

約数列:

[1, 3, 19, 47, 57, 61, 131, 141, 183, 393, 893, 1159, 2489, 2679, 2867, 3477, 6157, 7467, 7991, 8601, 18471, 23973, 54473, 116983, 151829, 163419, 350949, 375577, 455487, 1126731, 7135963, 21407889]

約数ペア:

[(1, 21407889), (3, 7135963), (19, 1126731), (47, 455487), (57, 375577), (61, 350949), (131, 163419), (141, 151829), (183, 116983), (393, 54473), (893, 23973), (1159, 18471), (2489, 8601), (2679, 7991), (2867, 7467), (3477, 6157)]