21171906

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1487}}^1$

素因数の和:1615

約数の個数: 48

約数和(自身を含む): 52925184

約数和(自身を除く): 31753278

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 113, 126, 226, 339, 678, 791, 1017, 1487, 1582, 2034, 2373, 2974, 4461, 4746, 7119, 8922, 10409, 13383, 14238, 20818, 26766, 31227, 62454, 93681, 168031, 187362, 336062, 504093, 1008186, 1176217, 1512279, 2352434, 3024558, 3528651, 7057302, 10585953, 21171906]

約数ペア:

[(1, 21171906), (2, 10585953), (3, 7057302), (6, 3528651), (7, 3024558), (9, 2352434), (14, 1512279), (18, 1176217), (21, 1008186), (42, 504093), (63, 336062), (113, 187362), (126, 168031), (226, 93681), (339, 62454), (678, 31227), (791, 26766), (1017, 20818), (1487, 14238), (1582, 13383), (2034, 10409), (2373, 8922), (2974, 7119), (4461, 4746)]