21525920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:238

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34357600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 79, 80, 104, 130, 131, 158, 160, 208, 260, 262, 316, 395, 416, 520, 524, 632, 655, 790, 1027, 1040, 1048, 1264, 1310, 1580, 1703, 2054, 2080, 2096, 2528, 2620, 3160, 3406, 4108, 4192, 5135, 5240, 6320, 6812, 8216, 8515, 10270, 10349, 10480, 12640, 13624, 16432, 17030, 20540, 20698, 20960, 27248, 32864, 34060, 41080, 41396, 51745, 54496, 68120, 82160, 82792, 103490, 134537, 136240, 164320, 165584, 206980, 269074, 272480, 331168, 413960, 538148, 672685, 827920, 1076296, 1345370, 1655840, 2152592, 2690740, 4305184, 5381480, 10762960, 21525920]

約数ペア:

[(1, 21525920), (2, 10762960), (4, 5381480), (5, 4305184), (8, 2690740), (10, 2152592), (13, 1655840), (16, 1345370), (20, 1076296), (26, 827920), (32, 672685), (40, 538148), (52, 413960), (65, 331168), (79, 272480), (80, 269074), (104, 206980), (130, 165584), (131, 164320), (158, 136240), (160, 134537), (208, 103490), (260, 82792), (262, 82160), (316, 68120), (395, 54496), (416, 51745), (520, 41396), (524, 41080), (632, 34060), (655, 32864), (790, 27248), (1027, 20960), (1040, 20698), (1048, 20540), (1264, 17030), (1310, 16432), (1580, 13624), (1703, 12640), (2054, 10480), (2080, 10349), (2096, 10270), (2528, 8515), (2620, 8216), (3160, 6812), (3406, 6320), (4108, 5240), (4192, 5135)]