21408327759

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{419}}^1\times {\mathrm{887}}^1$

素因数の和:1540

約数の個数: 64

約数和(自身を含む): 35422248960

約数和(自身を除く): 14013921201

約数列:

[1, 3, 7, 13, 21, 39, 91, 211, 273, 419, 633, 887, 1257, 1477, 2661, 2743, 2933, 4431, 5447, 6209, 8229, 8799, 11531, 16341, 18627, 19201, 34593, 38129, 57603, 80717, 88409, 114387, 187157, 242151, 265227, 371653, 561471, 618863, 1114959, 1149317, 1310099, 1856589, 2433041, 2601571, 3447951, 3930297, 4831489, 7299123, 7804713, 8045219, 14494467, 17031287, 24135657, 33820423, 51093861, 78418783, 101461269, 235256349, 548931481, 1019444179, 1646794443, 3058332537, 7136109253, 21408327759]

約数ペア:

[(1, 21408327759), (3, 7136109253), (7, 3058332537), (13, 1646794443), (21, 1019444179), (39, 548931481), (91, 235256349), (211, 101461269), (273, 78418783), (419, 51093861), (633, 33820423), (887, 24135657), (1257, 17031287), (1477, 14494467), (2661, 8045219), (2743, 7804713), (2933, 7299123), (4431, 4831489), (5447, 3930297), (6209, 3447951), (8229, 2601571), (8799, 2433041), (11531, 1856589), (16341, 1310099), (18627, 1149317), (19201, 1114959), (34593, 618863), (38129, 561471), (57603, 371653), (80717, 265227), (88409, 242151), (114387, 187157)]