21803985

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7691}}^1$

素因数の和:7715

約数の個数: 40

約数和(自身を含む): 44675136

約数和(自身を除く): 22871151

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7691, 23073, 38455, 53837, 69219, 115365, 161511, 207657, 269185, 346095, 484533, 622971, 807555, 1038285, 1453599, 2422665, 3114855, 4360797, 7267995, 21803985]

約数ペア:

[(1, 21803985), (3, 7267995), (5, 4360797), (7, 3114855), (9, 2422665), (15, 1453599), (21, 1038285), (27, 807555), (35, 622971), (45, 484533), (63, 346095), (81, 269185), (105, 207657), (135, 161511), (189, 115365), (315, 69219), (405, 53837), (567, 38455), (945, 23073), (2835, 7691)]