20123390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{431}}^1$

素因数の和:497

約数の個数: 64

約数和(自身を含む): 44789760

約数和(自身を除く): 24666370

約数列:

[1, 2, 5, 7, 10, 14, 23, 29, 35, 46, 58, 70, 115, 145, 161, 203, 230, 290, 322, 406, 431, 667, 805, 862, 1015, 1334, 1610, 2030, 2155, 3017, 3335, 4310, 4669, 6034, 6670, 9338, 9913, 12499, 15085, 19826, 23345, 24998, 30170, 46690, 49565, 62495, 69391, 87493, 99130, 124990, 138782, 174986, 287477, 346955, 437465, 574954, 693910, 874930, 1437385, 2012339, 2874770, 4024678, 10061695, 20123390]

約数ペア:

[(1, 20123390), (2, 10061695), (5, 4024678), (7, 2874770), (10, 2012339), (14, 1437385), (23, 874930), (29, 693910), (35, 574954), (46, 437465), (58, 346955), (70, 287477), (115, 174986), (145, 138782), (161, 124990), (203, 99130), (230, 87493), (290, 69391), (322, 62495), (406, 49565), (431, 46690), (667, 30170), (805, 24998), (862, 23345), (1015, 19826), (1334, 15085), (1610, 12499), (2030, 9913), (2155, 9338), (3017, 6670), (3335, 6034), (4310, 4669)]