21757528

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1597}}^1$

素因数の和:1747

約数の個数: 32

約数和(自身を含む): 44296560

約数和(自身を除く): 22539032

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 131, 262, 524, 1048, 1597, 1703, 3194, 3406, 6388, 6812, 12776, 13624, 20761, 41522, 83044, 166088, 209207, 418414, 836828, 1673656, 2719691, 5439382, 10878764, 21757528]

約数ペア:

[(1, 21757528), (2, 10878764), (4, 5439382), (8, 2719691), (13, 1673656), (26, 836828), (52, 418414), (104, 209207), (131, 166088), (262, 83044), (524, 41522), (1048, 20761), (1597, 13624), (1703, 12776), (3194, 6812), (3406, 6388)]