21037360

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2711}}^1$

素因数の和:2821

約数の個数: 40

約数和(自身を含む): 49434336

約数和(自身を除く): 28396976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2711, 3880, 5422, 7760, 10844, 13555, 21688, 27110, 43376, 54220, 108440, 216880, 262967, 525934, 1051868, 1314835, 2103736, 2629670, 4207472, 5259340, 10518680, 21037360]

約数ペア:

[(1, 21037360), (2, 10518680), (4, 5259340), (5, 4207472), (8, 2629670), (10, 2103736), (16, 1314835), (20, 1051868), (40, 525934), (80, 262967), (97, 216880), (194, 108440), (388, 54220), (485, 43376), (776, 27110), (970, 21688), (1552, 13555), (1940, 10844), (2711, 7760), (3880, 5422)]