21277408

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1$

素因数の和:371

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 22631072

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 89, 124, 178, 241, 248, 356, 482, 496, 712, 964, 992, 1424, 1928, 2759, 2848, 3856, 5518, 7471, 7712, 11036, 14942, 21449, 22072, 29884, 42898, 44144, 59768, 85796, 88288, 119536, 171592, 239072, 343184, 664919, 686368, 1329838, 2659676, 5319352, 10638704, 21277408]

約数ペア:

[(1, 21277408), (2, 10638704), (4, 5319352), (8, 2659676), (16, 1329838), (31, 686368), (32, 664919), (62, 343184), (89, 239072), (124, 171592), (178, 119536), (241, 88288), (248, 85796), (356, 59768), (482, 44144), (496, 42898), (712, 29884), (964, 22072), (992, 21449), (1424, 14942), (1928, 11036), (2759, 7712), (2848, 7471), (3856, 5518)]