21145545

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1$

素因数の和:282

約数の個数: 48

約数和(自身を含む): 38302992

約数和(自身を除く): 17157447

約数列:

[1, 3, 5, 9, 15, 41, 45, 73, 123, 157, 205, 219, 365, 369, 471, 615, 657, 785, 1095, 1413, 1845, 2355, 2993, 3285, 6437, 7065, 8979, 11461, 14965, 19311, 26937, 32185, 34383, 44895, 57305, 57933, 96555, 103149, 134685, 171915, 289665, 469901, 515745, 1409703, 2349505, 4229109, 7048515, 21145545]

約数ペア:

[(1, 21145545), (3, 7048515), (5, 4229109), (9, 2349505), (15, 1409703), (41, 515745), (45, 469901), (73, 289665), (123, 171915), (157, 134685), (205, 103149), (219, 96555), (365, 57933), (369, 57305), (471, 44895), (615, 34383), (657, 32185), (785, 26937), (1095, 19311), (1413, 14965), (1845, 11461), (2355, 8979), (2993, 7065), (3285, 6437)]