21461968

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{619}}^1$

素因数の和:835

約数の個数: 40

約数和(自身を含む): 45666720

約数和(自身を除く): 24204752

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 197, 394, 619, 788, 1238, 1576, 2167, 2476, 3152, 4334, 4952, 6809, 8668, 9904, 13618, 17336, 27236, 34672, 54472, 108944, 121943, 243886, 487772, 975544, 1341373, 1951088, 2682746, 5365492, 10730984, 21461968]

約数ペア:

[(1, 21461968), (2, 10730984), (4, 5365492), (8, 2682746), (11, 1951088), (16, 1341373), (22, 975544), (44, 487772), (88, 243886), (176, 121943), (197, 108944), (394, 54472), (619, 34672), (788, 27236), (1238, 17336), (1576, 13618), (2167, 9904), (2476, 8668), (3152, 6809), (4334, 4952)]