21945280

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:222

約数の個数: 112

約数和(自身を含む): 60935616

約数和(自身を除く): 38990336

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 97, 101, 112, 140, 160, 194, 202, 224, 280, 320, 388, 404, 448, 485, 505, 560, 679, 707, 776, 808, 970, 1010, 1120, 1358, 1414, 1552, 1616, 1940, 2020, 2240, 2716, 2828, 3104, 3232, 3395, 3535, 3880, 4040, 5432, 5656, 6208, 6464, 6790, 7070, 7760, 8080, 9797, 10864, 11312, 13580, 14140, 15520, 16160, 19594, 21728, 22624, 27160, 28280, 31040, 32320, 39188, 43456, 45248, 48985, 54320, 56560, 68579, 78376, 97970, 108640, 113120, 137158, 156752, 195940, 217280, 226240, 274316, 313504, 342895, 391880, 548632, 627008, 685790, 783760, 1097264, 1371580, 1567520, 2194528, 2743160, 3135040, 4389056, 5486320, 10972640, 21945280]

約数ペア:

[(1, 21945280), (2, 10972640), (4, 5486320), (5, 4389056), (7, 3135040), (8, 2743160), (10, 2194528), (14, 1567520), (16, 1371580), (20, 1097264), (28, 783760), (32, 685790), (35, 627008), (40, 548632), (56, 391880), (64, 342895), (70, 313504), (80, 274316), (97, 226240), (101, 217280), (112, 195940), (140, 156752), (160, 137158), (194, 113120), (202, 108640), (224, 97970), (280, 78376), (320, 68579), (388, 56560), (404, 54320), (448, 48985), (485, 45248), (505, 43456), (560, 39188), (679, 32320), (707, 31040), (776, 28280), (808, 27160), (970, 22624), (1010, 21728), (1120, 19594), (1358, 16160), (1414, 15520), (1552, 14140), (1616, 13580), (1940, 11312), (2020, 10864), (2240, 9797), (2716, 8080), (2828, 7760), (3104, 7070), (3232, 6790), (3395, 6464), (3535, 6208), (3880, 5656), (4040, 5432)]