21389008

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1487}}^1$

素因数の和:1555

約数の個数: 40

約数和(自身を含む): 44282880

約数和(自身を除く): 22893872

約数列:

[1, 2, 4, 8, 16, 29, 31, 58, 62, 116, 124, 232, 248, 464, 496, 899, 1487, 1798, 2974, 3596, 5948, 7192, 11896, 14384, 23792, 43123, 46097, 86246, 92194, 172492, 184388, 344984, 368776, 689968, 737552, 1336813, 2673626, 5347252, 10694504, 21389008]

約数ペア:

[(1, 21389008), (2, 10694504), (4, 5347252), (8, 2673626), (16, 1336813), (29, 737552), (31, 689968), (58, 368776), (62, 344984), (116, 184388), (124, 172492), (232, 92194), (248, 86246), (464, 46097), (496, 43123), (899, 23792), (1487, 14384), (1798, 11896), (2974, 7192), (3596, 5948)]