21374920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{787}}^1$

素因数の和:902

約数の個数: 64

約数和(自身を含む): 55601280

約数和(自身を除く): 34226360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 97, 140, 194, 280, 388, 485, 679, 776, 787, 970, 1358, 1574, 1940, 2716, 3148, 3395, 3880, 3935, 5432, 5509, 6296, 6790, 7870, 11018, 13580, 15740, 22036, 27160, 27545, 31480, 44072, 55090, 76339, 110180, 152678, 220360, 305356, 381695, 534373, 610712, 763390, 1068746, 1526780, 2137492, 2671865, 3053560, 4274984, 5343730, 10687460, 21374920]

約数ペア:

[(1, 21374920), (2, 10687460), (4, 5343730), (5, 4274984), (7, 3053560), (8, 2671865), (10, 2137492), (14, 1526780), (20, 1068746), (28, 763390), (35, 610712), (40, 534373), (56, 381695), (70, 305356), (97, 220360), (140, 152678), (194, 110180), (280, 76339), (388, 55090), (485, 44072), (679, 31480), (776, 27545), (787, 27160), (970, 22036), (1358, 15740), (1574, 13580), (1940, 11018), (2716, 7870), (3148, 6790), (3395, 6296), (3880, 5509), (3935, 5432)]