18908780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1409}}^1$

素因数の和:1490

約数の個数: 48

約数和(自身を含む): 44059680

約数和(自身を除く): 25150900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1409, 2684, 2818, 3355, 5636, 6710, 7045, 13420, 14090, 15499, 28180, 30998, 61996, 77495, 85949, 154990, 171898, 309980, 343796, 429745, 859490, 945439, 1718980, 1890878, 3781756, 4727195, 9454390, 18908780]

約数ペア:

[(1, 18908780), (2, 9454390), (4, 4727195), (5, 3781756), (10, 1890878), (11, 1718980), (20, 945439), (22, 859490), (44, 429745), (55, 343796), (61, 309980), (110, 171898), (122, 154990), (220, 85949), (244, 77495), (305, 61996), (610, 30998), (671, 28180), (1220, 15499), (1342, 14090), (1409, 13420), (2684, 7045), (2818, 6710), (3355, 5636)]