21066290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1171}}^1$

素因数の和:1442

約数の個数: 32

約数和(自身を含む): 43542144

約数和(自身を除く): 22475854

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 257, 514, 1171, 1285, 1799, 2342, 2570, 3598, 5855, 8197, 8995, 11710, 16394, 17990, 40985, 81970, 300947, 601894, 1504735, 2106629, 3009470, 4213258, 10533145, 21066290]

約数ペア:

[(1, 21066290), (2, 10533145), (5, 4213258), (7, 3009470), (10, 2106629), (14, 1504735), (35, 601894), (70, 300947), (257, 81970), (514, 40985), (1171, 17990), (1285, 16394), (1799, 11710), (2342, 8995), (2570, 8197), (3598, 5855)]