21642608

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1553}}^1$

素因数の和:1641

約数の個数: 40

約数和(自身を含む): 45861648

約数和(自身を除く): 24219040

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1553, 1742, 3106, 3484, 6212, 6968, 12424, 13936, 20189, 24848, 40378, 80756, 104051, 161512, 208102, 323024, 416204, 832408, 1352663, 1664816, 2705326, 5410652, 10821304, 21642608]

約数ペア:

[(1, 21642608), (2, 10821304), (4, 5410652), (8, 2705326), (13, 1664816), (16, 1352663), (26, 832408), (52, 416204), (67, 323024), (104, 208102), (134, 161512), (208, 104051), (268, 80756), (536, 40378), (871, 24848), (1072, 20189), (1553, 13936), (1742, 12424), (3106, 6968), (3484, 6212)]